DFS2520I MULTI-POSITIONING CANNOT BE SPECIFIED FOR A MSDB. - PCB dbdname IN PSB psbname.
Explanation
The PCB for an MSDB DBD specified multi-positioning (POS=M). This option is invalid for MSDBs.
System action
IMS continues processing the PCB, but does not process the remaining PCBs in the PSB. The PSB is deleted from ACBLIB. Normal execution continues, and the return code is set to 8.
Programmer response
Correct the POS= parameter on the PCB statement, rerun PSBGEN, and rerun ACBGEN with a BUILD statement for this PSB.