I have just moved from a 32-bit Windows 7 desktop to a 64-bit Windows 7 Laptop. We have a C# program that we are developing that contains approximately 60 projects within the solution. I keep getting the following error whilst trying to build:
Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed
Obviously the error is quite self explanatory and I am trying to get my whole solution to load in 32 bit mode. I have gone through every single project and set the target platform to x86 but I am still getting this error. I have searched Google and seen countless different approaches, but I cant seem to fix this problem. What is the best way to ensure my project is running in 32-bit mode on a 64-bit machine?
I am using Visual Studio 2008. I am currently considering downgrading to 32-bit but really want to avoid having to do this.
I found that you have to install the 32-bit Oracle client (you can download the installer from their website) even if you are running on a 64-bit machine.
In addition, during the discussions people were talking about 32-bit mode etc. This is how you can check / set that for an IIS 7 hosted application. You shouldn't need to change this but I have added here for completeness / future reference.
Launch IIS 7 and expand the server name node.
Click on Application Pools node and find the
application Pool you are using.
On the right-hand panel click Advanced Settings...
In the pop-up box that appears check Enabled 32-Bit Applications setting which is third option from the top.
You have to change your main .exe file to run only as 32-bit. You can do this in Visual Studio - just change Platform target from "Any CPU" to "x86".
If this is not possible, use corflags.exe which forces an existing exe to be a 32-bit application.
I have been struggling with this issue for months now and finally solved it. I think all the posts are helpful, but I had one missing piece. I didn't have a Microsoft ODBC for Oracle instance setup for User DSN or System DSN. I'm working on a Windows 8 machine. So for me I had to go to the general windows search and type in ODBC and open the ODBC Data Source Administrator (32-bit). Check to see if you have a Microsoft ODBC for Oracle setup on the User DSN tab or the System DSN tab. If not click on Add and select Microsoft ODBC for Oracle. Fill out the info for your datasource you are trying to hit and click ok. Make sure to restart your computer and that is what finally worked for me. Hope this helps some of you.
You have to change your main .exe file to run only as 32-bit. You can do this in Visual Studio - just change Platform target from "Any CPU" to "x86".
https://msdn.microsoft.com/en-us/library/ms185328.aspx
In my case 64 bit Oracle client was installed on my machine but still giving same error. So, I have analyse that in my application go to Application right click go to ->Properties->Web tab
and uncheck the "Use IIS Express" option if you are using local IIS Web server.
Problem got solved.
Related
Learning C# as I go along with managing an existing project given to me. I've noticed there seem to be deployment issues when I build from my windows 10 machine and set up the application on a user's Windows7 machine
Issues such as:
-Getting null pointer errors
-when saving word docs automatically, instead a save dialog box appears
I cannot for the life of me recreate the issues on my machine.
From what I see,
I use Windows 10 64bit with 32bit Microsoft Office
They use Windows 7 64bit with 32bit Microsoft office
We both have .NET v3, v3.5, v4.0.3... and the project is in v4
I can't help but think it is OS related issue I need to account for but I don't know whether I can trust this due to my lack of experience
Can anyone give some advice
My current plan is, since the users are not very accessible, I will try and get a laptop that replicates theirs. Then, if I can recreate the error on there, then i will install visual studio remote debugger and try to attach this external process and debug from my side. Mostly this is my only plan which is a long shot at best
It sounds like you're dealing with Office automation/addins. I would imagine that the version of Office is very important -- not just 32 bit vs 64 bit, but the specific build and version of Office/Word.
Recreating the error is key, as you suspect. Try setting up a Windows 7 VM on your PC with the same environment that the users have. This will make it easier for you to reproduce and debug the issue.
You also need to know the exact sequence of steps that causes the error, and if possible, you will need a copy of the document the user was working on.
Alright, so I've got a Windows service that has a FileSystemWatcher that watches an output folder for some Visual FoxPro database files. And it leverages the VFPOLEDB.1 provider to read those files. I cannot go away from this provider because it's being used in production.
However, I've never had to support this application before so that's why my development box isn't setup for it. Here is my environment:
Windows 7 x64
Visual Studio 2005
.NET 2.0 Windows service
so, when I first started getting the error I figured I just didn't have the provider at all, and I was right. So, I downloaded and installed it from here.
I then proceeded to drop the files in the folder again, but I got the same error.
I figured because it's an x64 machine I might be experiencing problems with it getting registered since it was probably dropped into SysWOW64, and it was as I expected, so I ran this command:
regsvr32 "C:\Windows\SysWOW64\mscomct2.ocx"
and it said it was successfully registered (which means about nothing LOL) but I dropped the files in again - same error.
I have not yet rebooted my machine, and I can if somebody has a compelling reason that's the problem, but generally speaking if the assembly is registered properly with regsvr32 that's not necessary. I've worked with a ton of COM objects and never have to reboot to get to the object as long as I've registered it.
Does anybody know another step I need to perform to get this thing registered?
It is registered as it should. It is your application that is compiled for AnyCPU Platform.
In x64 operating system this produces 64bit code and 64bit code could not access 32bit drivers.
Change your Platform to x86 and you will be fine.
EDIT
Two years later there is something to add to this answer. Now with Visual Studio 2013 the cheese has been moved. The article linked explain in great details how the compiler setup defaults has been changed. The AnyCPU target CPU with Prefer 32 bit means that your application works as 32bit app also in x64bit operating systems leaving practically no-room to x64 application unless specifically required.
With this new configuration becomes also important to remember what is posted in comments below by Mark Berry. If your (now 32bit) app needs to work in a IIS 64bit environment you need to set the Application Pool with Enable 32 bit Applications
I have desktop app (Win7 x64 VS 2015) - and kept getting the same error no matter what. I changed platform target to x86, installed MSI as admin etc - did everything I could google - and no luck. What helped me is to install MSI for Everyone instead of Just me - one of the last wizard's screen in the setup.
I have the same problem.
I install the VFP Ole DB Provider in my system and resolved.
download link
use Advantage OLE DB Provider,works for 32 or 64,here is the connection string
I have developed a C# winform application in Visual Studio 2010 that connects to a Access 2010 *.accdb database. It works fine on my pc but when I install it on another, It throws the error "The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine."
I tried to compile it to x86, as advised, without any succes.
Any help/advice is appreciated, I think that I should include this driver as part of my clickOnce install. If so, how do I do so? (It does not appear as an option in the checklist of requirements, in VS Properties > Publish > Previous requirements)
You will have to use a more advanced method of deploying the necessary driver - ClickOnce won't do it by itself as far as I know. I also don't think it's as simple as a single DLL. The driver needs to register with the system etc.
There is a big issue with the Access drivers because of the way they are set up. If the user has Microsoft Office with Access installed, they will already have the ACE driver. The problem is, if they have 32 bit Access installed on a 64 bit machine, your 64 bit application will not be able to talk to Access because the machine only has a 32 bit driver, and you cannot install both.
If none of your users have Microsoft Office with Access, then you should be able to deploy the standalone driver installer for 32/64 bit as necessary with each computer.
It is possible to include arbitrary assemblies and files as part of your ClickOnce install by adding them to the project and changing their file type to Content. They will then appear in the list of Application Files.
Note that you'll get a warning from Visual Studio if you do this, but it can be safely ignored.
You can build an msi instead of oneclick and create a custom action that would install ace driver in quiet mode. Since its an executable you can just run it in a process object
I made C# application for my friend which has connection to access database (mdb file). I have developed application on my computer with win7 x86 installed. My friend had XP and it worked perfectly, but now he installed win7 x64 and application doesn't work. In fact, application starts and behave regular, but cannot connect to database... Database too can be opened with access, but my application cannot connect to it.
What can be a problem? How to make my application works on both operating systems?
regards,
Vajda
Ask your friend to download and install the following file:
Microsoft Access Database Engine 2010 Redistributable
and make sure he picks the 64-bit version there (AccessDatabaseEngine_x64.exe).
By default there is no 64-bit ODBC/OLEDB driver for Access installed, but the 2010 version should work for 2007 databases as well.
You could probably also configure your program to be built for the x86 target. That would run the program as a 32-bit program, even on 64-bit OS.
Most likely, the .Net CLR is trying to fire the app up in 64bit mode by default on his new win7 box and this might be causing some issues with the referenced assemblies.
The first thing I would try is to change the Platform target of the application (go to Project properties in Visual Studio for the application) to x86 (from Any CPU) to force the application to run in 32bit mode.
If this works, you will have narrowed down your problem.
Then, after building the project, look in the bin folder to see which assemblies are being copied to the output folder. If you see any System.Data... or any other .Net assemblies that are already contained in the GAC, you'll want to delete these and then try to fire it up. This will force the application to use GAC assemblies written for 64bit use.
I have a relatively simple ASP.NET application that I am trying to create an installer for. I am currently using Visual Studio 2008's "Web Setup Project" which, though I'm told is not ideal, has proved no problems when installing on Windows Server 2003 & IIS6.
IIS7 on Server 2008 and Vista has proved substantially more difficult. The installer starts off fine before halting with an unhelpful "The installer was interrupted before could be installed. You need to restart the installer to try again." UAC is switched off, and I've already ensured I'm executing the installer with administritive privledges.
The problem sounds identical to the issue outlined in this blog post, however I have the IIS6 Metabase Compatibility role service installed already. I've also tried playing around with AppPools, the Integrated/Classic pipelines and so on, all to no avail.
I've since turned on MSI logging and, whilst I found nothing concrete, I believe the rollback begins somewhere around this error message.
The error indicates that IIS is in 64 bit mode, while this application is a 32 bit application and thus not compatible.
This doesn't make any sense to me whatsoever, as both Vista and Server 2008 are 32-bit installations. I suspect it's a red herring, but I can't be sure.
Has anyone encountered a similar problem, and if so, is there a solution that doesn't involve me moving to a different installation framework?
Try putting a friendly lil checkmark beside each node in
[Programs and Features // Turn Windows features on or off // Internet Information Services // Web Management Tools // IIS 6 Management Compatibility]
Note that I had the same symptoms posted in the blog though, and this fixed it for me. Yours may be different.
Just tackled this last night, therefore my sincerest good luck to you.
In order to fix that error message for those using Windows 2003 x64, use the following commands from a cmd prompt:
cscript.exe %SystemDrive%\Inetpub\AdminScripts\adsutil.vbs set W3SVC/AppPools/Enable32BitAppOnWin64 "true"
cd WINDOWS\Microsoft.NET\Framework\v2.0.50727
aspnet_regiis.exe -i
Source:
How to Run a Microsoft .NET 2.0 or higher Web Application in 32-bit Mode in IIS 6.0 on a 64-bit Server
Note:
By doing the first step, you will now notice that the ASP.net tab is no longer visible.
This is a known bug and the work around is too use scripts to change the .Net version for any running sites.