GLO7658E Error occurred during allocation for SYSIN.

Explanation
During SMF Reporting Utility processing,
the SORT_BY parameter was specified.  To perform sort processing,
the utility must allocate the ddname SYSIN to communicate with the
sort routine, but the allocation was unsuccessful.  Message GLO7649E
accompanies this message and provides diagnostic information about
the error. 

User response
Contact IBM® Software Support. 