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If in doubt about the amount of workspace to supply to a ScaLAPACK routine, the user may choose to supply LWORK=-1  and use the returned value in WORK(1) as the correct value for LWORK. Setting LWORK=-1 does not invoke an error message from PXERBLA and is defined as a global query   .

Susan Blackford
Tue May 13 09:21:01 EDT 1997