Error recovery procedure FM header

An ERP exception response need not be received by IMS before receiving an FMH7 ERP header and associated message. FMH7 messages sent by IMS indicate either RQE1/CD or RQD1/EB, as appropriate. ERP messages that are sent or received by IMS are limited to a single SNA chain of SCS characters and must not contain VLVB format records. FMH7 messages received by IMS must indicate either CD or EB. RQE1 or RQD1 is allowed on either.

Single-segment error messages that are created within IMS are 79 characters or less in length. Multi-segment messages that are created within IMS can be greater than 79 characters in length, but each segment has a 79-character maximum length.

Error messages that are created by input to the ISC error message process for output to the master terminal or source operator terminal create single- and multi-segment output messages (DFS2073 or DFS2083).

IMS inserts error messages into IMS message queues by using a default MFS MOD name. These messages are formatted as defined by the MOD during output to a component defined with MFS DPM. These MODs and associated DOFs are contained in the MFS format library.

Each selective receiver ERP message is preceded by an ERP message header that includes the specific system and user error sense codes.