The exit runs in cross memory mode. The addresses of the CKDS records that are used by the exit are ALET-qualified. The exit receives both the current CKDS record address and the record's associated ALET as parameters in the exit parameter list. The exit must run in AR mode, and must use the information passed in the exit parameter list to access CKDS entries. For information about cross memory mode and AR mode, see z/OS MVS Programming: Extended Addressability Guide.