REPEAT . . . UNTIL loop problem

[Didier Lachieze]

I don't know why you have this syntax error, but I would try two things:
First replace: UNTIL exit==1; by: UNTIL exit;
Then if you (likely) still have the same error, replace:
REPEAT
. . .
UNTIL exit==1;
by:
WHILE exit==0 DO
. . .
END;