It may be that you have SMS "TRACE(ON)" option set. If so, the best method is to change the SMS "TRACE(OFF)". If this is not possible then each user must enter "TSO PROF NOWTPMSG" . The NOWTPMSG can also be set globally for all the users. You can also issue the NOWTPMSG from a Alchemist startup script.
This Frequently Asked Question applies to all supported releases of ESP Alchemist beginning with 5.*.