S0C7 on Moving alphanumeric data to COMP-3

S0C7 on Moving alphanumeric data to COMP-3 I get confused, when a question about COMP-3 and its relation I have heard lot of people saying moving alphanumeric data to COMP-3 would  Can someone let me know if its true or not? I tried the sample code and it worked fine for me without any S0C7 abend 01 WS-COMP3 PIC 9(6)V99  COMP-3. MOVE ‘TESTING’   TO WS-COMP3 So is it correct to say that move of alphanumeric value to COMP-3 variable  does not cause S0C7 abend, and if so , what would cause S0C7 “; ; ; ;