A LEAVE or ITERATE instruction was found at an incorrect position.
Either no loop was active, or the name specified on the instruction did not match the control variable of any active loop.
The associated subcodes are:
001
LEAVE is valid only within a repetitive loop or labeled block instruction.
002
ITERATE is valid only within a repetitive loop.
003
Symbol following LEAVE ("symbol") must either match the label of a current loop or block instruction.
004
Symbol following ITERATE ("symbol") must either match the label of a current loop or be omitted.
005
Symbol following ITERATE ("symbol") does not match a repetitive block instruction.
