You can specify a data set to receive trace data from an MVSSERV session, as well as messages issued by the CHSTRACE macro. For messages and data to be received in the trace data set, MVSSERV must be invoked with the TRACE or IOTRACE option. The level of trace data from MVSSERV varies with the option used:

• TRACE -- records events in the MVSSERV session, such as requests for servers, and MVSSERV errors.
• IOTRACE -- records the TRACE information and communications with the PC, including data transmissions and the contents of the CPRB.