Solution:
- Issue "/S rmostc,PARM=OFF"
The RMOSTC task will come up, then go down, properly removing the "hooks". - Change the RMOPARM SYSID, to another and unique value.
- Issue "/S rmostc"
The RMOSTC task will start.
Changing the RMOPARM SYSID, to another value, will cause a new program call to be assigned, which will prevent the abend.