compiler failed with error code 2000

[Rich]

I get this message when running almost every time I do an incremental
compile.

A full rebuild makes it go away. A subsequent incremental compile causes the
problem again.

I've read posts about clearing aspnet temp files and tried that, it doesn't
work. Any help would be appreciated.

Compiler Error Message: The compiler failed with error code 2000.

The output indicates...

vbc : Command line error BC2017 : could not find library
'c:\windows\microsoft.net\framework\v1.1.4322\temporary asp.net
files\mywebproject\58b24dc9\fbd54b87\assembly\dl2\3ab4f481\c1ae28e7_6138c401
\anAssembly.dll'
vbc : Fatal error BC2000 : compiler initialization failed unexpectedly: The
filename, directory name, or volume label syntax is incorrect.