Cannot find DLL in 'Temp asp.net files' directory, error BC2017

[Don]

I intermittently get a runtime Compilation Error that says 'The
compiler failed with error code 2000'. It appears that a DLL cannot
be found in the 'temporary asp.net files' directory.
The Detailed Compiler Output is at the bottom of this post.

This is a custom dll named UtilitiesINGR.dll that I put in the GAC. I
added a machine.config entry to instruct my app to use the GAC entry.
Now I need to remove the dll from the GAC so I can update it. I removed
the entry from the GAC and removed the entries in machine.config. I
now reference the project in the IDE and set Copy Local = true for the
reference properties.

I keep getting the 'Compilation Error' and I have deleted the
contents of the' temporary asp.net files' directory. I also
removed every copy to utilitesINGR.dll on my machine. I then reinstall
the .NET framework. I still get the error.

Detailed Compiler Output:
C:\WINDOWS\system32>
"c:\windows\microsoft.net\framework\v1.1.4322\vbc.exe" /t:library
/utf8output
/R:"c:\windows\assembly\gac\system.web\1.0.5000.0__b03f5f7f11d50a3a\system.web.dll"
/R:"c:\windows\assembly\gac\system\1.0.5000.0__b77a5c561934e089\system.dll"
/R:"c:\windows\assembly\gac\system.web.services\1.0.5000.0__b03f5f7f11d50a3a\system.web.services.dll"
/R:"c:\windows\assembly\gac\system.xml\1.0.5000.0__b77a5c561934e089\system.xml.dll"
/R:"c:\windows\microsoft.net\framework\v1.1.4322\temporary asp.net
files\weaponsystemengineering\0825400e\a192f987\assembly\dl2\8c8e32ff\1930ba83_b5e0c501\weaponsystemengineering.dll"
/R:"c:\windows\assembly\gac\system.drawing\1.0.5000.0__b03f5f7f11d50a3a\system.drawing.dll"
/R:"c:\windows\assembly\gac\dotnetcharting\3.0.1838.19244__af2cd47db69d93bd\dotnetcharting.dll"
/R:"c:\windows\assembly\gac\system.web.mobile\1.0.5000.0__b03f5f7f11d50a3a\system.web.mobile.dll"
/R:"c:\windows\microsoft.net\framework\v1.1.4322\temporary asp.net
files\weaponsystemengineering\0825400e\a192f987\assembly\dl2\ce1054b1\379f9fa8_d9dfc501\ingrcontrols.dll"
/R:"c:\windows\assembly\gac\system.data\1.0.5000.0__b77a5c561934e089\system.data.dll"
/R:"c:\windows\assembly\gac\system.enterpriseservices\1.0.5000.0__b03f5f7f11d50a3a\system.enterpriseservices.dll"
/R:"c:\windows\microsoft.net\framework\v1.1.4322\temporary asp.net
files\weaponsystemengineering\0825400e\a192f987\assembly\dl2\3eef8330\15b2c3a5_d9dfc501\utilitiesingr.dll"
/R:"c:\windows\assembly\gac\coalesys.webmenu\4.0.84.1__3c85914aca6a0634\coalesys.webmenu.dll"
/out:"C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\Temporary ASP.NET
Files\weaponsystemengineering\0825400e\a192f987\remdto2g.dll"
/DEBUG=1 /debug+
"C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\Temporary ASP.NET
Files\weaponsystemengineering\0825400e\a192f987\remdto2g.0.vb"


Microsoft (R) Visual Basic .NET Compiler version 7.10.3052.4
for Microsoft (R) .NET Framework version 1.1.4322.573
Copyright (C) Microsoft Corporation 1987-2002. All rights reserved.

vbc : Command line error BC2017 : could not find library
'c:\windows\microsoft.net\framework\v1.1.4322\temporary asp.net
files\weaponsystemengineering\0825400e\a192f987\assembly\dl2\3eef8330\15b2c3a5_d9dfc501\utilitiesingr.dll'
vbc : Fatal error BC2000 : compiler initialization failed unexpectedly:
The filename, directory name, or volume label syntax is incorrect.