Develop Reference

First time deploying ASP.NET web api, ran into '/' error

This is the first time i am deploying an ASP web api. The api runs smoothly in Debug/Release section but i got an error when first deployed it.
libzkfpcsharp is a dll that supports only x86. I changed The configuration properties to x86 to support the dll but i still get an error. Anyone knows how to deal with this?
Could not load file or assembly 'libzkfpcsharp' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.BadImageFormatException: Could not load file or assembly 'libzkfpcsharp' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Assembly Load Trace: The following information can be helpful to determine why the assembly 'libzkfpcsharp' could not be loaded.
WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
Stack Trace:
[BadImageFormatException: Could not load file or assembly 'libzkfpcsharp' or one of its dependencies. An attempt was made to load a program with an incorrect format.]
System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +232
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) +113
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +23
System.Reflection.Assembly.Load(String assemblyString) +35
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +48
[ConfigurationErrorsException: Could not load file or assembly 'libzkfpcsharp' or one of its dependencies. An attempt was made to load a program with an incorrect format.]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +767
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +256
System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +58
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +287
System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies() +69
System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath, Boolean& isRefAssemblyLoaded) +137
System.Web.Compilation.BuildManager.ExecutePreAppStart() +172
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +854
[HttpException (0x80004005): Could not load file or assembly 'libzkfpcsharp' or one of its dependencies. An attempt was made to load a program with an incorrect format.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +532
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +111
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +724

You also need to change you App.domain with in IIS to run in 32 bit mode

Issue with Asp.Net MVC App - Cannot load 'System.Diagnotics.Tracing'

I have an ASP.Net MVC app on .Net 4.7.2. I updated some nuget packages, and now when the application runs I receive an error as below.
I have downgraded the System.Diagnostics.Tracing nuget package and then upgraded it to version 4.3.0 but the error still occurs.
Server Error in '/' Application.
Cannot load a reference assembly for execution.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.BadImageFormatException: Cannot load a reference assembly for execution.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[BadImageFormatException: Cannot load a reference assembly for execution.]
[BadImageFormatException: Could not load file or assembly 'System.Diagnostics.Tracing' or one of its dependencies. Reference assemblies should not be loaded for execution. They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)]
System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +36
System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +152
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) +77
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +21
System.Reflection.Assembly.Load(String assemblyString) +28
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +38
[ConfigurationErrorsException: Could not load file or assembly 'System.Diagnostics.Tracing' or one of its dependencies. Reference assemblies should not be loaded for execution. They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +726
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +196
System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +45
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +172
System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies() +91
System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath, Boolean& isRefAssemblyLoaded) +111
System.Web.Compilation.BuildManager.ExecutePreAppStart() +156
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +695
[HttpException (0x80004005): Could not load file or assembly 'System.Diagnostics.Tracing' or one of its dependencies. Reference assemblies should not be loaded for execution. They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +659
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +89
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +188
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3282.0

The issue was due to an incorrect bindingRedirect:
<dependentAssembly>
<assemblyIdentity name="System.Diagnostics.Tracing" publicKeyToken="B03F5F7F11D50A3A" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-4.2.0.0" newVersion="4.2.0.0" />
</dependentAssembly>
Removing the "bindingDirect" completely solved the issue.

Could not load file or assembly stdole

Just installed VS2015 side by side with VS2010...
Application in issue was built using VS2010 (set to use .Net 4.0) (not migrated to VS2015) worked fine on my machine, put it on server and fell over in a heap...
stdole was the issue...
In the error Windows Logs > Applications there was an exception:
Exception information:
Exception type: ConfigurationErrorsException
Exception message: Could not load file or assembly 'stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. Strong name signature could not be verified. The assembly may have been tampered with, or it was delay signed but not fully signed with the correct private key. (Exception from HRESULT: 0x80131045)
at System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective)
at System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory()
at System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai)
at System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig)
at System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies()
at System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath, Boolean& isRefAssemblyLoaded)
at System.Web.Compilation.BuildManager.ExecutePreAppStart()
at System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException)
Could not load file or assembly 'stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. Strong name signature could not be verified. The assembly may have been tampered with, or it was delay signed but not fully signed with the correct private key. (Exception from HRESULT: 0x80131045)
at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection)
at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
at System.Reflection.Assembly.Load(String assemblyString)
at System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective)
Could not load file or assembly 'stdole' or one of its dependencies. Strong name signature could not be verified. The assembly may have been tampered with, or it was delay signed but not fully signed with the correct private key. (Exception from HRESULT: 0x80131045)
Stack trace: at System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective)
at System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory()
at System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai)
at System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig)
at System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies()
at System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath, Boolean& isRefAssemblyLoaded)
at System.Web.Compilation.BuildManager.ExecutePreAppStart()
at System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException)
Looked at reference to stdole and it was to the GAC and to a Version: 2.0.0.0
The bitness of nothing has changed.
Where on earth has this error come from?

Just in case anyone else encounters the issue the same way I did...
This is how I resolved the issue:
Deleted the existing reference to stdole, then added a reference > extensions > there were four entries for stdole! one with the office icon, one with the VS icon, one with a cog (setup icon) and another with no icon (all four were exactly the same version numbers etc)...
Added a reference to the one with VS icon and deployed to server...
all going well (touch wood)

There is now a Nuget package which provides stdole.dll:
https://www.nuget.org/packages/stdole
So today this may be the most reliable way of including it in your project, if you don't want to assume it is in the GAC or if you need a specific version. There are versions going from 17.0.0 (preview) all the way back to 7.0.3300, although not contiguously. (Not sure if they jumped version numbers or if some are actually missing?)

Add a reference in your project to 'stdole.dll', which can be found in a couple of different places
Your GAC (C:\Windows\assembly)
C:\Program Files (x86)\Common Files\Microsoft Shared\MSEnv\PublicAssemblies
Rebuild, redeploy and all should be good.

You might want to explore why the stdole library (or one of its dependencies) has been tampered.
In the meantime, run the command sn -Vr * in a command prompt to disable the integrity check on your local machine.

System.BadImageFormatException error

I am using Windows Server 2008 R2 Datacenter 64-bit OS. I am using Visual Studio 2013 that has a solution with 2 projects and I am encountering this error.
Exception Details: System.BadImageFormatException: Could not load file
or assembly 'EyeCantSeeEngine' or one of its dependencies. An attempt
was made to load a program with an incorrect format.
Source Error:
An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.
Assembly Load Trace: The following information can be helpful to
determine why the assembly 'EyeCantSeeEngine' could not be loaded.
=== Pre-bind state information === LOG: DisplayName = EyeCantSeeEngine (Partial) WRN: Partial binding information was supplied for an
assembly: WRN: Assembly Name: EyeCantSeeEngine | Domain ID: 2 WRN: A
partial bind occurs when only part of the assembly display name is
provided. WRN: This might result in the binder loading an incorrect
assembly. WRN: It is recommended to provide a fully specified textual
identity for the assembly, WRN: that consists of the simple name,
version, culture, and public key token. WRN: See whitepaper
http://go.microsoft.com/fwlink/?LinkId=109270 for more information and
common solutions to this issue. LOG: Appbase =
file:///C:/Users/Administrator/Documents/ISFC_Main/EyeCantSee/EyeCantSeeEngine/
LOG: Initial PrivatePath =
C:\Users\Administrator\Documents\ISFC_Main\EyeCantSee\EyeCantSeeEngine\bin
Calling assembly : (Unknown).
LOG: This bind starts in default load context. LOG: Using application
configuration file:
C:\Users\Administrator\Documents\ISFC_Main\EyeCantSee\EyeCantSeeEngine\web.config
LOG: Using host configuration file:
C:\Users\uni\Documents\IISExpress\config\aspnet.config LOG: Using
machine configuration file from
C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Policy not being applied to reference at this time (private,
custom, partial, or location-based assembly bind). LOG: Attempting
download of new URL
file:///C:/Users/uni/AppData/Local/Temp/1/Temporary ASP.NET
Files/root/b917a818/774df716/EyeCantSeeEngine.DLL. LOG: Attempting
download of new URL
file:///C:/Users/uni/AppData/Local/Temp/1/Temporary ASP.NET
Files/root/b917a818/774df716/EyeCantSeeEngine/EyeCantSeeEngine.DLL.
LOG: Attempting download of new URL
file:///C:/Users/Administrator/Documents/ISFC_Main/EyeCantSee/EyeCantSeeEngine/bin/EyeCantSeeEngine.DLL.
ERR: Failed to complete setup of assembly (hr = 0x8007000b). Probing
terminated.
Stack Trace:
[BadImageFormatException: Could not load file or assembly
'EyeCantSeeEngine' or one of its dependencies. An attempt was made to
load a program with an incorrect format.]
System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String
codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint,
StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean
throwOnFileNotFound, Boolean forIntrospection, Boolean
suppressSecurityChecks) +0
System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String
codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint,
StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean
throwOnFileNotFound, Boolean forIntrospection, Boolean
suppressSecurityChecks) +34
System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName
assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly,
StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean
throwOnFileNotFound, Boolean forIntrospection, Boolean
suppressSecurityChecks) +152
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString,
Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr
pPrivHostBinder, Boolean forIntrospection) +77
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString,
Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean
forIntrospection) +16 System.Reflection.Assembly.Load(String
assemblyString) +28
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String
assemblyName, Boolean starDirective) +38
[ConfigurationErrorsException: Could not load file or assembly
'EyeCantSeeEngine' or one of its dependencies. An attempt was made to
load a program with an incorrect format.]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String
assemblyName, Boolean starDirective) +752
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory()
+218 System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo
ai) +130
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection
compConfig) +170
System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies()
+91 System.Web.Compilation.BuildManager.CallPreStartInitMethods(String
preStartInitListPath, Boolean& isRefAssemblyLoaded) +285
System.Web.Compilation.BuildManager.ExecutePreAppStart() +153
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager
appManager, IApplicationHost appHost, IConfigMapPathFactory
configMapPathFactory, HostingEnvironmentParameters hostingParameters,
PolicyLevel policyLevel, Exception appDomainCreationException) +521
[HttpException (0x80004005): Could not load file or assembly
'EyeCantSeeEngine' or one of its dependencies. An attempt was made to
load a program with an incorrect format.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9950728
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context)
+101 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest
wr, HttpContext context) +254
I have tried changing the target platform of the project of the error from x64 to x86 and the error that I encounter next is this.
Exception Details: System.OutOfMemoryException: Exception of type
'System.OutOfMemoryException' was thrown.
Source Error:
An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.
Stack Trace:
[OutOfMemoryException: Exception of type 'System.OutOfMemoryException'
was thrown.] System.Reflection.RuntimeAssembly._nLoad(AssemblyName
fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly
locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder,
Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean
suppressSecurityChecks) +0
System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String
codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint,
StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean
throwOnFileNotFound, Boolean forIntrospection, Boolean
suppressSecurityChecks) +34
System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName
assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly,
StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean
throwOnFileNotFound, Boolean forIntrospection, Boolean
suppressSecurityChecks) +152
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString,
Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr
pPrivHostBinder, Boolean forIntrospection) +77
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString,
Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean
forIntrospection) +16 System.Reflection.Assembly.Load(String
assemblyString) +28
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String
assemblyName, Boolean starDirective) +38
[ConfigurationErrorsException: Exception of type
'System.OutOfMemoryException' was thrown.]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String
assemblyName, Boolean starDirective) +752
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory()
+218 System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo
ai) +130
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection
compConfig) +170
System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies()
+91 System.Web.Compilation.BuildManager.CallPreStartInitMethods(String
preStartInitListPath, Boolean& isRefAssemblyLoaded) +285
System.Web.Compilation.BuildManager.ExecutePreAppStart() +153
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager
appManager, IApplicationHost appHost, IConfigMapPathFactory
configMapPathFactory, HostingEnvironmentParameters hostingParameters,
PolicyLevel policyLevel, Exception appDomainCreationException) +521
[HttpException (0x80004005): Exception of type
'System.OutOfMemoryException' was thrown.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9950728
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context)
+101 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest
wr, HttpContext context) +254
I have also tried changing the Enable 32-bit Applications in the IIS Application Pools to True but the System.BadImageFormatException error still persist. Greatly appreciated for any suggestions to solve this error.

BadImageFormatException usually means architecture conflits.. Like trying to install a 32 bit assembly with a x64 install util for example.
Also in the pre-bind state information you can read this line:
WRN: A partial bind occurs when only part of the assembly display name
is provided.
WRN: This might result in the binder loading an incorrect assembly.
Which might indicate that you are not using a fully qualified name to load an assembly but just the type. Try specifying the fully qualified name of the assembly you are trying to load.

System.BadImageFormatException - Invalid Token when updating DLL to newest version?

I've had this project running for a couple of months using a couple of company-specific DLL's. I just downloaded and updated to the newest version and I am now receiving this error. I don't believe it is specific to the DLLs themselves, more something in my project not expecting new versions. The stack trace isn't very helpful.
Server Error in '/dashbad' Application.
Invalid token.
Description: An unhandled exception occurred during the execution of
the current web request. Please review the stack trace for more
information about the error and where it originated in the code.
Exception Details: System.BadImageFormatException: Invalid token.
Source Error:
An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.
Stack Trace:
[BadImageFormatException: Invalid token.]
System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String
codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint,
StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean
forIntrospection, Boolean suppressSecurityChecks) +0
System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String
codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint,
StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean
forIntrospection, Boolean suppressSecurityChecks) +39
System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName
assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark,
Boolean forIntrospection, Boolean suppressSecurityChecks) +132
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString,
Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean
forIntrospection) +144 System.Reflection.Assembly.Load(String
assemblyString) +28
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String
assemblyName, Boolean starDirective) +46
[ConfigurationErrorsException: Invalid token.]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String
assemblyName, Boolean starDirective) +618
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory()
+209 System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo
ai) +130
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection
compConfig) +178
System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies()
+94 System.Web.Compilation.BuildManager.CallPreStartInitMethods() +332 System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager
appManager, IApplicationHost appHost, IConfigMapPathFactory
configMapPathFactory, HostingEnvironmentParameters hostingParameters,
PolicyLevel policyLevel, Exception appDomainCreationException) +591
[HttpException (0x80004005): Invalid token.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +8950644
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest
wr, HttpContext context) +256
Version Information: Microsoft .NET Framework Version:4.0.30319;
ASP.NET Version:4.0.30319.1
Has anyone encountered this error in a similar setting / any debugging advice?

This could be a 32bit / 64bit issue. You could try targeting a particular platform with your compiles and see if this fixes your issues.