The FACTOTUM task is our master task's slave. One of its jobs is to provide terminal services to the task RHDCMSTR.
If it is a VTAM terminal, you may want to check the status of the terminal.
We've had similar cases where IDMS tried to write something to the terminal,
but that one was already disconnected, outside of IDMS, which could point to a problem at the VTAM level.
You can use the following commands to determine the status of the line and terminals :
DCMT D LINE <involved line>
DCMT D LTE <involved lte>
DCMT D PTE <involved pte>