Dictionary Error

[dschless]

I am attempting to use Visual Build Pro v5 to build a Visual C++ solution. I have done the build successfully in the past but am now receiving the error listed below. After receiving the error, I tried doing the build directly from Visual Studio and everything ran fine. Is anyone familiar with this error?
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Building project step 'Compile'...
Building project step 'Compile: Rebuild All CheckQ Solution'...
Item has already been added. Key in dictionary: "CDDED37D-6FF5-4C8F-9D0C-C93A3148D44C" Key being added: "CDDED37D-6FF5-4C8F-9D0C-C93A3148D44C"
Step 'Compile: Rebuild All CheckQ Solution' failed
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Thanks,
Dan Schless