Small correction in code: In Transform Map (function transformRow(source, target, map, log, isUpdate) { if(source.u_type == 'Mobile phone'){ target.type = 'cellphone'; } if(source.u_state == 'Assigned'){ target.install_status = '1'; } })(source, target, map, log, action==="update"); ******************************************* in 'Field Map[script] answer = (function transformEntry(source) { // Add your code here return source.u_model_number.toUpperCase(); // return the value to be put into the target field })(source);