Upgrade failed

I am trying to upgrade my VB6 project to VB2005 and I am getting an error "Upgrade failed: Exception occurred: General error accessing file "C".

Does anyone know what is this about and how to fix it?

[216 byte] By [IPM] at [2008-2-22]
# 1

I'm not sure what could be causing this error. Would you mind sending me an email and we can work through the issue off line? You can reach me at JohnHart@Microsoft..Com

JohnHart_MSFT at 2007-8-31 > top of Msdn Tech,Visual Basic,Visual Basic Interop and Upgrade...