mmm *** message(aa...aa) cannot be output: message too long ***

The message cannot be output because the message length exceeds the upper limit.

mmm: NET identifier

aa...aa: Sequence number for the message ID that could not be output

S: Continues processing.

O: Contact the maintenance personnel.

Countermeasure: Record the IDs of this message and the message that could not be output. Then, contact the maintenance personnel.