# Suppressing CICS Signon or Signoff Messages

In a Substation ES environment using EXCI, a lot of CICS Signon or Signoff messages are produced. To improve system performance, you can suppress all of these messages.

## Procedure

1. Verify that the `USERHLQ.ASM(SXCAXMEO)` data set is what you want.
   If the data set is correct, all messages for `DFHSN1100`, `DFHSN1200`, `DFHSN1400`, and `DFHSN1500` will be suppressed.
2. If you are using the startup program supplied by TIBCO, add the `SXC3XMEN` program to the PLT startup program.
   This can be done by uncommenting the following line in the `USERHLQ.ASM(DFHPLTXI)` member:

   `DFHPLT TYPE=ENTRY,PROGRAM=SXC3XMEN`

3. Reassemble the `DFHPLTXI` member by running the `USERHLQ.JCL(SXCASMLK)` data set.

   After the CICS region starts, the following confirmation message is displayed:

   `SXC3XMEN - EXIT("XMEOUT") SXCAXMEO Installed`

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