RDML Reserved Field Names
Any fields that start with the prefix value contained in the JSMCLTDTA data area will be excluded from the field list transfer. This prefix value occupies positions 51 to 60 of the data area JSMCLTDTA. For Windows or Linux, this prefix value can be set with a keyword value pair in file jsmcltdta.txt. The keyword to specify the prefix is ExcludePrefix (Example: ExcludePrefix=JSM).
The default value for this prefix is JSM. This prefix allows the JSMSTS, JSMMSG and JSMCMD variables to be excluded from the field list transfer.
For more information refer to 3.8 Data Areas.