I have a ztable called 'ZBILL_MASTER'. Fields in it have SAP defined as well as user-defined datalements. Acc. to my requirement i have to get a report and display a few fields of that table in an editable list dsplay. I am getting data into a itab. I am using manual field catalog to display. but, when the grid display i s being called system giving shortdump saying that __" Field symbol has not yet been assigned. "__ while debugging i am able to view data coming into itab. It is giving fieldcatalog related shortdumps. I am struggling with this for a long time. FM parameters are also given properly . Please, help me in this issue.