C#.net 2008 compile problem

Question

I am getting the following error message  when building a C#.net 2008 windows application in debug mode and I am trying to determine what is wrong:
C:\Documents and Settings\user\My Documents\Projects\appname.PostBuild\bin\x86\Debug\\appname.PostBuild.exe Debug" exited with code 9009. 
a. Is the problem with 'debg\\appname', by there being two \\ in a row?
b. Is the problem caused by code 9009? What would I do to solve the 'code 9009' error'?
Thanks!