The communications system received a message to send to a non-existent task. Possible explanations are:
Internal MP firmware error.
On the MP-30 system, the required expansion ROM is bad or not installed correctly.
On the MP-30, the PH9, scan, or probe changer options have been configured into the system, and the expansion ROMs are not on the MP CPU board.
What you should do:
To clear the error, power the MP down.
Power the MP back up.
If the error reoccurs, contact your Giddings & Lewis service representative.