1974848 - An internal Error "dfo_GroupBy.cxx 391" happened while running a select statement. SAP IQ

1. Some query which have a group by in a view or subquery might be failed with "dfo_GroupBy.cxx:391" error message.
2. Error message
   ********************************************************
   **
   **       Non-Fatal IQ Internal Error Detected
   **       at dfo_GroupBy.cxx:391  on thread 2919667472 (TID 26)
   **       Error detected at DFO #02 Group By (Hash)
   
   
3. Stacktrace

          pcstkwalk(...........
          ucstkgentrace(...........
          StackTraceForThisThread(...........
          df_Exception::df_Exception(...........
          df_Exception::ThrowException(...........
          dfo_GroupBy::ReplaceFPVInVirtualCols(...........
          opt_Driver::ProjectOrdinals(...........
          opt_Driver::DelayedProjectionTransform(...........
          opt_Driver::DelayedProjectionTransform(...........

SAP SYBASE IQ 15.4 SP03 (ESD3)

dfo_GroupBy, dfo_GroupBy::ReplaceFPVInVirtualCols, ReplaceFPVInVirtualCols, CR 746164, CR 743236 , KBA , BC-SYB-IQ , Sybase IQ , Problem