JCL parameter referenceEdit online You can use JCL parameters to control the operation of IMS HP Change Accumulation Utility. HPCSYSIN DD parametersJCL parameters that control the operation of IMS HP Change Accumulation Utility are read from the HPCSYSIN DD statement in all modes.General syntax for HPCSYSIN DDExtended batch control statements are read from the HPCSYSIN DD file. Operation statementsThe following topics describe the operation statements that are used by IMS HP Change Accumulation Utility.Parent topic: Administering IMS HP Change Accumulation Utility