Hi robhaas

    You need to put this coe in the onbefore transform script. You do not need the business rule anymore.

if(action=='insert'){

//parse the values

var gr= new GlideRecord("table name");

gr.addQuery('<field name of SYSTEM on target table>',<parsed value of SYSTEM from source field>);

gr.addQuery('<field name of GROUPNAME on target table>',<parsed value of GROUPNAME from source field>);

gr.query();

if(gr.next()){

gr.<approver field name on target table>=source.<approver field name>;

gr.update();

ignore=true;

}