This has resulted in various problems, including an ASCB storage overlay and a spin loop. In each reported case, an abend occurred in the ZMF task and invoked the Sernet Recovery Routine, which then took a wild branch. Not all ZMF task abends will result in this problem.
STC CHGMAND received a couple of S0C4's and then terminated with a S878. Messages received: "SER0953E Task abnormally terminated: Comp=S0C4 Function=DSS/INFO NSI=08BBD12E SER0953E Task abnormally terminated: Comp= Function=/ { SUB .EN_US}NSI={NEXT SEQUENTIAL INSTRUCTION}