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

OVERFLOW

ERROR: #35OP1WPFH2RS5HX9ZP2QNH9I5ZWUY3DV