Error building/cleaning VS.Net solution

[mweinberger]

I added a 'Make VS.Net' step, where the only non default entry is the complete path to the solution to my Microsoft Visual Studio.Net 2003 C++ project. Whenever I try to clean or build the project, I get the following message:

7/8/2006 11:47:21 PM: Building project step 'Make VS.NET - Clean'...
Item has already been added. Key in dictionary: '17FF1AC2-4788-4054-9696-8B4E4D6C1E74' Key being added: '17FF1AC2-4788-4054-9696-8B4E4D6C1E74'
7/8/2006 11:47:22 PM: Step 'Make VS.NET - Clean' failed
7/8/2006 11:47:22 PM: Build ended.


Please note, that I can bring up Visual Studio 2003 (VS03) and perform a batch build and then everything builds/cleans with no errors or warnings.

What can the problem be? Thanks in advance,