XML file

Are you trying to prevent variables from being changed, or are you wanting to change them?

If you have the J541 Password Protection option you can use something as shown below to prevent certain users from accessing or modifying system variables. Change the level #'s and access 0/1's to meet your needs.

<SCREEN level="1" sp_id="34" scrn_id="1" access="1" rw_access="0"/>

<SCREEN level="2" sp_id="34" scrn_id="1" access="1" rw_access="1"/>

<SCREEN level="3" sp_id="34" scrn_id="1" access="1" rw_access="0"/>

Without J541, you may be able to set the specific system variable in BG logic - depending on the user this may not be effective either.