You can use CodeWatch to debug PL/I programs running under CICS, either by calling the PLITEST built-in subroutine directly or by using the CICS preprocessor to call the PLITEST.
Use the -optexec option with the plitest parameter to allow the CICS preprocessor to insert the call. When using this method, specify values for the CODEWATCH_SRCPATH and CODEWATCH_STBPATH environment variables, to match the locations for the appropriate program source and debug files. See PLITEST Subroutine for more information on using PLITEST to start CodeWatch. See the -optexec option in Compiler Options for more information on -optexec.