CLER - Language Environment runtime options
The CLER transaction is provided by Language Environment® and is not shipped as part of the CICS® Transaction Server product.
Use the CLER transaction to display the Language Environment runtime options. You can also modify a subset of the options. If you want to print the runtime options, you can write them to the CESE queue.
CLER is a conversational transactional that presents the display panel shown in Figure 1.
CLER CICS IYCLZCFE
LANGUAGE ENVIRONMENT REGION LEVEL RUNTIME OPTIONS
TYPE IN YOUR CHOICES.
RUNTIME OPTION CHOICE POSSIBLE CHOICES
ALL31 ==> ON ON, OFF
CBLPSHPOP ==> ON ON, OFF
CHECK ==> ON ON, OFF
INFOMSGFILTER ==> OFF ON, OFF
RPTOPTS ==> OFF ON, OFF
RPTSTG ==> OFF ON, OFF
TERMTHDACT ==> DUMP QUIET,MSG,TRACE,DUMP,UAONLY,UADUMP,UAIMM,UATRACE
TRAP ==> OFF ON, OFF
WHEN FINISHED, PRESS ENTER.
Note:
- The CLER transaction uses basic mapping support (BMS) and therefore this function is available only through those terminal devices that are supported by BMS.
The transaction, program, and mapset resource definitions that you require to run
CLER are in the DFHLE group. 
For information about how to use the CLER transaction, see z/OS Language Environment Debugging Guide.