10 REM FILE TEST
20 OPEN 1, 8, 4, "TESTFILE,SEQ,W"
30 IF ST <> 0 THEN PRINT "FILE ERROR"
40 IF ST = 0 THEN PRINT "FILE EXISTS"
50 CLOSE 1

NOT OUTPUT FILE

ERROR: #EYEG1E0WZC6CQ5UV7P2T1CM7HDD6X0Q7