I have a small application, it launches properly without debugger and all the features work except one which uses IronOcr (package from NuGet package manager). When I try to use this feature the program just closes.
When I launch this application from within visual studio, everything works fine. No errors and all features work. I get the same result if I run it and attach the debugger to it afterwards. However if I run the exe by launching the exe /bin/release and do not attach the debugger it crashes when I try to use the feature involving IronOcr.
I tested this on a virtual machine, same results with/without debugger. I then tested it on a different computer (fresh install of windows only having VS installed) it gave me this error if debugger is attached:
System.IO.FileNotFoundException: 'Could not load file or assembly 'IronOcr, Version=2021.2.1.0, >Culture=neutral, PublicKeyToken=c2cbcea5ea3f6d8d' or one of its dependencies. The system cannot >find the file specified
I've spent the last few days looking up a reason for this but I have not found one so far that fixes the issue.
What is confusing me the most is:
I assume the error that causes the program to close is the same error that causes it to give this error on the different PC. When I run it through VS it has no issues (it finds the file?) but running it from the exe it cannot find the file. I'm not moving the exe, just running it where it is in the bin/release.
I'm hoping this program will be able to run as a standalone exe.
I am still relatively new to c# and VS, the error may be glaringly obvious, or I may be using the wrong words causing me to not find a solution.
probably a bit too late, but your problem certainly comes from the fact you're using the free licence of IronOCR. It seems that this one only works when the debugger is attached.
If you catch the exception, you get that message:
IronSoftware.Licenses.Exceptions.LicensingException: IronOcr must be
licensed for deployment outside of the Visual Studio development
environment. https://ironpdf.com/licensing
In my opinion this is too restrictive for proper evaluation, so I gave up trying to use it.
Make sure IronOcr.dll is exist at same directory as your executable file.
Try to execute your application from Bin/Debug and see if it runs ok or not.
Check to see if IronOcr.dll exist in Bin/Debug but does not exist in Bin/Release. if so then copy it from Bin/Debug to Bin/Release.
I'm playing with VS2015 and C# 6.0 compiler. Everything it great, but I suddenly started getting strange compilation error on one of my projects:
"csc2.exe" exited with code 1.
I would love to provide as much data as needed, but I guess I don't have much:
I have several project in the solution. All projects (excluding the project where I have unit tests) still compile without any problems.
Quick googling did not help.
I've looked into output, there isn't much: C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.CSharp.CurrentVersion.targets(383,9): error MSB6006: "csc2.exe" exited with code 1.
VS restart as well as reboot didn't helped.
Rollback of latest changes (but I can't give you 100% that I rolled back all of them) didn't help.
I'm stuck! I would appreciate any advice.
UPDATE
As #rene suggested I run MSBuild.exe with /v:diag. In the produced output I could finally find the root of the problem: I mistyped enum member name. I usually expect to see such errors in the error list, but they are not there until I open the file (where the error is taking the place). As soon as the file is opened in the VS, I can perfectly fine see all errors in the error list.
Hope that this will be fixed by the next CTP.
In my case, i was remote debugging my project dll through another visual studio. When I try to delete obj folder it failed to delete .pdb file. That triggered me that I have a visual studio left running. Closed it, retry build, boom, it worked fine. Just in case, check obj folder for any pdb file locks. That could also be a reason.
I have set an output folder for my .dll project though the Project Properties, which I call "Output".
The problem is, from an empty Output folder, the first time I Build the project, it's fine. The second time, I get the following error:
Error 328 Unable to copy file "obj\Release\MyLibrary.dll" to
"......\Output\Release\MyLibrary.dll". The process cannot access the
file '......\Output\Release\MyLibrary.dll' because it is being used
by another process.
The "another process" is the vshost.exe from Visual Studio. Since it keeps acessing MyLibrary.dll, it can't be deleted or replaced, thus why the error. This keeps the MyLibrary.dll on the Output folder not updated. However I have other .dll projects in my solution in which this does'nt happen.
The solution I have used so far to update it is to close the VS (thus closing vshost.exe), then run a .bat file which deletes the file Output\Release\MyLibrary.dll, then open the VS again and Rebuild it's project.
I know little of what exactly vshost.exe does, so I have no idea from where to start to clear this problem from the root. I don't know why this happens to a specific .dll. I appreciate any idea that helps me investigate why this happens.
vshost.exe is the Visual Studio Hosting process. It is a custom CLR host that loads your EXE and makes debugging easier. You can turn it off, that has very few side-effects. Project + Properties, Debugging tab, untick the "Enable the Visual Studio hosting process" option.
You are more likely to find the real problem in your program now. With the most common issue that your program doesn't quit when you ask it to. You will still get a build error, you'll now see your own EXE fingered as the one that keeps a lock on the DLL. You will also see it back in the Task Manager's Process tab. Which also allows you to kill it.
It isn't that clear to me how programmers recreate this problem. Pressing Ctrl+F5 instead of F5 certainly will do this, always press F5 to immediately attach the debugger when you start the program. Using Debugger + Stop Debugging will now reliable stop the program. You can otherwise use Tools + Attach to Process to get a debugger attached again later to find out what your program is doing.
Anti-malware is a common scourge worth mentioning, they get way too excited when they see an executable file appear from nowhere. If you use Avast then just uninstall it completely, it is quite incompatible with VS.
I get latest from source control and can not build my visual studio solution. I get the following error:
Cannot copy assembly 'XYZ' to file 'C:\myfolder\bin\Debug\XYZ.dll'. The process cannot access the file because it is being used by another process.
I have rebooted the machine but nothing seems to work. please help.
Use ProcessExplorer to determine what other process is holding the DLL open - my bet is that it is Visual Studio itself. Try closing down any open form Design windows (or all code/design windows in VS.Net for that matter) and see if you still get the same problem.
You can use the handle tool to determine what process is using that file:
handle XYZ.dll
From there, you can figure out what started the process and why it's using the file.
Whenever i've seen that error, it was because the program i was trying to compile was still running. You may want to check and make sure any debug sessions are stopped (not just paused, but stopped completely), and that your program doesn't appear in the Task manager under the "Processes" tab.
Try changing the build configuration from Debug to Release and try compiling again.
let's try a simple solution. The DLL in your bin directory is likely marked as Read-Only. Visual studio doesn't check out the DLLs from the BIN directory when you check out source files. So if you keep the binaries in source safe then you need to manually check them out or manually take off the read-only flag in the directory.
I have a project in C# and I get this error every time I try to compile the project:
(Unable to copy file "obj\Debug\Project1.exe" to "bin\Debug\Project1.exe". The process cannot access the file 'bin\Debug\Project1.exe' because it is being used by another process.)
So I have to close the process from the task manager. My project is only one form and there is no multi-threading.
What is the solution (without restarting VS or killing the process)?
This should work.
Go to your project properties.
Inside Build Events, under Pre-build event command line, add these two lines of code:
if exist "$(TargetPath).locked" del "$(TargetPath).locked"
if exist "$(TargetPath)" if not exist "$(TargetPath).locked" move "$(TargetPath)" "$(TargetPath).locked"
#Udpate: Since the time I was first posting this 'answer', I tend to another explanation to the problem. The issue since than happened more and more often outside of Visual Studio also - while trying to copy an .exe file from one folder to another. While in the first place Windows did not allow to copy(!) an .exe file (it was first asking me for administrative rights but refused to copy it afterwards anyway) it still showed up in the explorer. But after a while - without any further action taken, it disappeared magically. Just like the problem in the question always seems to solve itself after a while. So i assume, the problem is more related to a delayed deletion of the project output file and less a buggy VS. I apologize for any unjustified suspicion. :|
This gives the search for a solution a complete different direction, I guess. Did find that link and will update on any progress:
https://superuser.com/questions/234569/windows-7-delayed-file-delete
========================================================================
This is a known bug in VS. I discovered it very often - mostly in VS2010 (with/without SP1). Several "solutions" are recommended. Some of them, which kind of helped for me:
Delete the .suo file in your project dir. Eventually need to create your whole solution from scratch.
Close any Windows Form Designers may remain open.
Use a prebuild script, which deletes the target from the output dir.
Disable the VS hosting process.
None of these really fixes the bug. But it may brings the VS back to a usable state - until a true solution is provided by MS (if ever will).
http://social.msdn.microsoft.com/Forums/en/vsdebug/thread/cea5e4b2-5b33-453c-bffb-8da9f1a1fa4a
http://social.msdn.microsoft.com/Forums/en/vbide/thread/cd12f3c7-de96-4353-adce-23975e30933f
I can confirm this bug exists in VS 2012 Update 2 also.
My work-around is to:
Clean Solution (and do nothing else)
Close all open documents/files in the solution
Exit VS 2012
Run VS 2012
Build Solution
I don't know if this is relevant or not, but my project uses "Linked" in class files from other projects - it's a Silverlight 5 project and the only way to share a class that is .NET and SL compatible is to link the files.
Something to consider ... look for linked files across projects in a single solution.
This is happening because [yourProjectName].exe process is not closing after finishing debugging.
There are two solutions to this problem.
Every time you make change to application, Go to Task Manager -> Processes -> [yourProjectName].exe, end this process. You have to end this process every time you make changes to system.
Add a exit button in your application to exit window and add these line to click event
System.Diagnostics.Process.GetCurrentProcess().Kill();
Application.Exit();
If you look in the obj directory, and you don't see your .exe, it's possible that Avast! or other antivirus is deleting it. I would actually see the .exe show up and then disappear. As soon as I turned off Avast!, problem solved.
VS2010 throwing "Could not copy the file "obj\x86\Debug\[file].exe" because it was not found."
The real problem isn't the error you're getting; it's that the application isn't cleaning up after itself.
It's either holding on to references, not freeing resources, or something else that's causing the process to not end when it's being told to close. Fix up that issue and this problem will resolve itself. We can't really help you with that unless you post your code (and at this point, if you need help with that, you should start a new question).
I had to go into windows explorer and delete the bin/debug folder as well as the obj/debug folders. Then I cleaned & rebuilt the project.
Close your project
Delete bin folder
i find it work, :)
Rename the assembly to a different name to solve this issue.
After seeing a similar error in visual studios 2012 out of no where. I have found that that going to the root folder of the project and right clicking on it I unchecked read only and this error went away. Apparently TFS sometimes will made a folder read only. Hopefully this will help anyone with a similar issue. Thanks
This happened to me at VS 2010 and Win 7..
Case :
I can not Rebuild with Debug Configuration manager, but I can rebuild with Release Configuration manager
What I have tried:
Check my account type at control panel - user account --> My Account is Administrator
Set the bin folder not read only
Add security at bin folder to Everyone
stop the iis server
Stop antivirus, check ridiculous running program using task manager and ProcessExplorer
run VS as administrator
If All that way is still not working.
Then, the last way to try:
close solution
close visual studio
start - shutdown
press power button to turn on the computer
login to your account which has administrator previlege at user type
reopen solution
rebuild
that way working. All people call this way as Reset Computer
Mine got solved by:
Clean solution
Close all processes depending on VS (Current instances).
Rebuild
I had same problem, after read your answers , went to Task Manager and searched for app.exe because i believe maybe it doesn't close .
And found it , select it and do END TASK .my problem solved.
Before rebuild the solution, clear the project, stop the IIS and open the "bin" folder property. Uncheck the Read-only Attribute in general tab then rebuild.
I found that ending all msbuild.exe tasks (in Task Manager) fixed the issue with VS2012.
I struggeled with this since years.
I finally downloaded LockHunter to find out who locked the file.
In my case it was MBAM.
Once I added my project's directory to MBAMs exclusion list, I didn't have this problem anymore.
I too had the same issue. I resolved it
Closed my VS, then in Task Manager, End tasks like Microsoft VisualStudio WCF Tools, MSBuild.exe
Then open VS and clean and rebuild.
No matter what the cause of this problem is, the only working solution for me is the following:
Go to Your-Project-Properties -> Application tab(first tab) -> Change the Assembly name.
This way your app creates a new assembly file each time you change the assembly name.
Finally, after you finish to develop, you can delete all those extra assembly files and just keep the last one (main one). Non of the other solutions worked for me, except this one.
Run Visual Studio as Administrator
We recently experienced this on a WinPhone 8 project, in VS 2012 Update 2.
Inexplicably, the cause was using the Tuple type. Removing the code that used a Tuple the problem went away. Add the code back the problem returned.
This will Sound crazy, when ever i build the project the error will be displayed and the avast antivirus will show it as malicious attempt and the project does not run.i just simply disable my antivirus and build my solution again the missing .EXE file has been Created and the project has been successfully executed.
Or you can try this
Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug
I solved this by killing XDesProc which had a handle on the DLL it couldn't delete.
Well i have the same problem, my way to fix it was to stop and disable the "application experience" service in Windows.
Not a direct answer to your question..
One scenario when this can come is listed below -
If your application is under Debugging process - say by "Attach to Process" debugging, this error may come
If this error was encountered, you can proceed as the following
End the msbuild.exe task
End the explorer.exe task
Run the explorer.exe task again
for me it was the antivirus. Just add visual studio project or entire parent folder to Antivirus exclusion list or you can also add file extension as exclusion and this method worked for me in visual studio 2010/2012
Solution1:
Close the project.
Delete the bin folder.
Open the project.
Build the project.
Solution2:
Add the following code in pre-build event:
attrib -r $(OutDir)*..\* /s
This command line code will remove the ready-only attribute of "bin" folder. Now visual studio can easily delete and copy new dlls.
A very simple solution is to open the Task Manager (CTRL + ALT + DELETE), go to Processes tab and search by name the processes with your project name that are still running. Kill all the processes and go on ! :)
after day with search and build and rebuild i found that you just need to turn off turn on the visual studio its look like it catch the service in different thread
My Visual studio 2019 suddenly stops and restarts and then when i run project this error comes.
I resolve this issue by going into my project folder and delete bin and obj folder
Then clean and rebuild my project. This resolve my issue.