Hey all,

For one of my ASP.NET 3.5 applications, every single time I try to build the web app, it throws the following build errors:

Error 165 Unable to copy file "C:\InOne\Common\DexProcessor\bin\Debug\DexProcessor.dll" to "bin\DexProcessor.dll". The process cannot access the file 'bin\DexProcessor.dll' because it is being used by another process. InVision2
Error 166 Unable to copy file "C:\InOne\Common\DexParser\bin\Debug\InOne.DexParser.dll" to "bin\InOne.DexParser.dll". The process cannot access the file 'bin\InOne.DexParser.dll' because it is being used by another process. InVision2
Error 167 Unable to copy file "C:\InOne\Common\AlertProcessor\bin\Debug\InOne.Invision.AlertProcessing.dll" to "bin\InOne.Invision.AlertProcessing.dll". The process cannot access the file 'bin\InOne.Invision.AlertProcessing.dll' because it is being used by another process. InVision2
Error 168 Unable to copy file "C:\InOne\Common\InVision.BusinessLogic\bin\Debug\InVision.BusinessLogic.dll" to "bin\InVision.BusinessLogic.dll". The process cannot access the file 'bin\InVision.BusinessLogic.dll' because it is being used by another process. InVision2
Error 169 Unable to copy file "C:\InOne\Common\InVision.Common\bin\Debug\InVision.Common.dll" to "bin\InVision.Common.dll". The process cannot access the file 'bin\InVision.Common.dll' because it is being used by another process. InVision2
Error 170 Unable to copy file "C:\InOne\Data\bin\Debug\InVision.Data.dll" to "bin\InVision.Data.dll". The process cannot access the file 'bin\InVision.Data.dll' because it is being used by another process. InVision2
Error 171 Unable to copy file "C:\InOne\Common\InVision.DataAccessLayer\bin\Debug\InVision.DataAccessLayer.dll" to "bin\InVision.DataAccessLayer.dll". The process cannot access the file 'bin\InVision.DataAccessLayer.dll' because it is being used by another process. InVision2
Error 172 Unable to copy file "C:\InOne\Common\InVision.DataAccessLayer.SqlClient\bin\Debug\InVision.DataAccessLayer.SqlClient.dll" to "bin\InVision.DataAccessLayer.SqlClient.dll". The process cannot access the file 'bin\InVision.DataAccessLayer.SqlClient.dll' because it is being used by another process. InVision2

I read online to add some pre-build events but that didn't work for me. I also tried adding to the project files:

<GenerateResourceNeverLockTypeAssemblies>true</GenerateResourceNeverLockTypeAssemblies>

This just started happening a couple days ago and is very annoying... I have to go into the web app's bin folder and delete the pdb files and then it'll let me delete the dll's most of the time. Every once in a while it doesn't let me so I have to close Visual Studio and then it lets me delete them.

This is really reducing my productivity, is there anything I can do to resolve this?

Thanks,

Justin

 Ok I assume since this has been a few days I would have assumed you have tried to re-boot, but some people develop for days on end without re-starting; have you done this (just as a check mark). 

I have had this happen to me at least a half dozen times since developing in VS.NET 2008.  Sometimes, I believe that one of the WebDev.WebServer.exe processes (icon that is down in the tray when debugging a project; can be shut down in TaskManager) gets hung up and locks those files.

For me 1 of (3) things has fixed this issue.

1. Restarting Visual Studio
2. Shutting down all instances of WebDev.WebServer.exe either manually or via TaskManager in Windows.
3. Re-booting the machine.

One last effort may be to clear any temporary cached files that VS.NET is using.  Here is an article on clearing them:

http://robertbogley.wordpress.com/2007/09/19/how-to-speed-up-loading-time-in-microsoft-visual-studionet-2005-projects/

...by the way the folder location for Step # 2 from the above link if using Vista is as follows:

C:\Users\[UserName]\AppData\Local\Microsoft\WebsiteCache

Hope this helps!

Thanks for the quick reply.

I use IIS rather than the web dev server so that one isn't an issue. I've tried rebooting multiple times and resetting iis to no avail. I read the post and cleared all of those temp directories, then rebooted, and the first rebuild it still gives the errors...

Any other things I can try??

:: bump ::