I think the UNTIL should be in behind NEXT A2, rather than on the FOR line.
Hoping to lighten the day...
BAIL = 0
FOR A1 = 1 TO XYZZY
FOR A2 = 1 TO Y
<little twisted logic>
IF G # H THEN BAIL = 51 ;* error code
UNTIL BAIL DO
<twisted little logic>
NEXT A2
UNTIL BAIL DO
<twisting little logic>
NEXT A1
IF BAIL THEN DISPLAY 'Housten, we have a problem in Area ':BAIL
Or use a GOSUB - RETURN does a fair job of being readable.
Regards, Keith
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