DFS1967 MESSAGE SEGMENT BUFFER OVERLAY

Explanation
 The EDIT EXIT routine can change the message contents
and can increase the message length by as much as 256 bytes. The total
message length cannot exceed 32,764 bytes. If the message length exceeds
this limit, or if the message is increased by more than 256 bytes,
the message is truncated.

System action
 The message is truncated.

Programmer response
 Correct the Edit Exit routine to prevent
an increase of the message of more than 256 bytes.