I'm at a road block.  I'm writing a VS 2005 class library with a class that extends an APS.NET control.

When I do a 'Rebuild', I get a the following exact error message:
Unable to write to output file 'C:\Visual Studio 2005\Projects\CLICWebControls\obj\Debug\ClicWebControls.pdb': System Error &H80004005&

So far, I've:
- Did a Clean, first (the file doesn't exist), followed by a 'Rebuild' (the file exists after the Rebuild fails with the error).  Still nothing.
- ensured that the system service "Indexing Service" is not running (it's stopped and "manual")
- Rebooted the machine

Any ideas or suggestions would be greatly appreciated!

Humbly yours,

Don B

Are you testing/debuggin your class when you try to rebuild?  I.e., if you have another project that has a reference to the location where this class is building itself ('C:\Visual Studio 2005\Projects\CLICWebControls\obj\Debug\'), and you run that project, then that project will put a lock on the pdb file.

To resolve this, you can a) add an 'existing item' (this class DLL) to the other project's bin folder instead of an updating reference, b) shut down the other project everytime you want to rebuild this class, or c) whenever you create a lock on the file that won't go away (the problem you mentioned), simply shut down the other project, navigate to where the pdb file is, and delete it.  This will allow the class to regenerate the pdb file.

I don't like option a very much because you have to re-add the DLL to the other project after every build. 

If this doesn't work, try creating a new project and porting all your code over to it.

Are you testing/debuggin your class when you try to rebuild?  I.e., if you have another project that has a reference to the location where this class is building itself ('C:\Visual Studio 2005\Projects\CLICWebControls\obj\Debug\'), and you run that project, then that project will put a lock on the pdb file.

No, I can't test it because I can't build it.  It was the only Visual Studio project open at the time, so option A and B don't apply.
I didn't try option C, because "Clean" deleted the file for me.

 I started a new project, pulling in only what I needed (it was a very small project), and it works now. 

I don't know exactly what the problem was, not a fix, but this works for me.

 Thanks for the pointers ps2goat.

Don