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IMP-00039:

VOLSIZE does not match the value used for export: string
Cause: The value specified for VOLSIZE does not match the value specified during the creation of the export file.
Action: If you believe that the specified VOLSIZE value is correct, verify that you specified the correct file for import. If you specified the correct file but are unsure about the correct value, re-execute the import command but specify VOLSIZE=0.