Remove any Communications Support Module settings

If your Informix® Version 15.0 instance used CSMs, edit the sqlhosts file to remove any csm option settings that are not supported in the older database server.

If you do not do this, the older database server will return an invalid sqlhosts options error.

You must also delete the concsm.cfg file if the older database server does not support CSMs.

Note: Support for Simple Password Communication Support Module (SPWDCSM) and Encryption Communication Support Module (ENCCSM) is removed starting Informix Server 14.10.xC9. You should use Transport Layer Security (TLS)/Secure Sockets Layer (SSL) instead. Generic Security Services Communication Support Module (GSSCSM) continues to be supported.