The SYSMOD being installed must be a prerequisite for, or must supersede, all UMIDs associated with the distribution library element.

Assemblies resulting from ++SRC/++SRCUPD and ++MAC/++MACUPD elements are considered to be replacement modules; the SYSMOD being installed must specify on the PRE or SUP operand all UMIDs of the corresponding distribution library modules to be replaced by the assembly. No exception is made for a SYSMOD that does not specify, on the PRE or SUP operand, all UMIDs associated with modules that have been assembled, because any UMIDs associated with the module are ZAPs that would be overlaid by a new assembly.

If the SYSMOD being processed does not specify each UMID of the element on the PRE or SUP operand of the ++VER MCS, SMP/E does not accept that SYSMOD, because doing so would regress the service supplied by the SYSMODs that the UMIDs represent. If you want to allow the regression to occur, you can use the BYPASS(ID) operand on the ACCEPT command. The MODID check condition is then reported as a warning, and the elements are installed on the distribution libraries.