rpmbuild harmless error message

[David.Dembrow at corp.rockwellcollins.com]

I have a spec file to package an internal application that generates the 
following error messages which appear to happen before the prep section:

        tar:  Error in writing to standard output
        tar:  Error is not recoverable exiting now

then it starts processing the prep section, and eventually successfully 
builds the rpm packages.

Can someone help me track down what the problem is and how I may get rid 
of the problem.

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