The following mainframe REXX facilities are not supported by MSS:
- Sequence numbers in the last eight bytes of fixed-length source records are recognized but no checking is done on the order of these numbers. Sequence numbers in variable-length records are not recognized.
- The TRACE S instruction is syntactically allowed but does not trace the remaining clauses in the exec. The exec is fully syntax checked when it is first loaded.
- Numeric options entered during interactive debugging are not supported.
- CICS REXX is not supported.
- Compiled REXX execs are not supported.
- APPCMVS, ATTACH, ATTACHMVS, ATTACHPGM, CONSOLE, CPICOMM, ISPEXEC, ISREDIT, LINK, LINKMVS, LINKPRM, and LU62 host command environments are not supported:
- User-defined host command environments are not supported.
- The following REXX programming services are not supported:
- IRXEXCOM - variable access routine
- IRXEXEC - exec processing routine
- IRXHLT - halt condition routine
- IRXIC - trace and execution control routine
- IRXINIT - initialization routine
- IRXLIN - LINESIZE function routine
- IRXRLT - get result routine
- IRXSAY - SAY instruction routine
- IRXSUBCM - maintain entries in the host command environment table
- IRXTERM - termination routine
- IRXTXT - text retrieval routine
- Replaceable routines and exits are not supported.
- DBCS is not supported.
