MFLD There is a limit of 500 MFLDs which can be defined for a single input or output message. Only MFLDs which specify a DFLD-name
are counted toward the limit of 500. That is, MFLD literals and MFLDs with only a LTH keyword are not counted. If the message
contains LPAGE definitions, the limit is 500 MFLDs for each logical page. The limit of 500 is after any DO statement expansion.
MSG-- MID and MOD Statements There is a limit of 16,386 output messages which can be defined in a single input data set. The input message definition must
be present in the same input data set as its corresponding output definition.
PASSWORD-- MID and MOD Statements The PASSWORD statement is not supported. However, any MFLDs defined after the PASSWORD and before the first SEG are logically
removed from the input message. The mapping between the program and the input message is maintained.
SEG There is a limit of 100 SEG statements which can be defined in any one input or output message.