The CONNX TSO configuration utility for VSAM (REXX exec CNXCFG and program CNXCFGB) enables the user to to set, remove, and display persistent CONNX environment variables and to stop the CONNX TCP/IP Listener Program (CNXRUNB). Unlike its CICS counterpart, the CONNX TSO configuration utility cannot be used to start the CONNX TCP/IP Listener Program (CNXRUNB). This program is started as a job step in the CNXVSAM/CNXVSCT JCL procedures, which can be executed either as batch jobs or as started tasks.