exitloop argument num_levels is too large
    Facility: DEBUG, VMS Debugger
    Explanation: The parameter specified on the EXITLOOP command is
    greater than the number of loops nested at this time. It is also
    possible that you have specified an EXITLOOP command when you are
    not inside of a loop.
    User Action: Reduce the parameter on the EXITLOOP command to no
    more than the number of loops nested at the time the EXITLOOP
    command is to be executed. If there are no loops currently being
    executed, then the EXITLOOP command is redundant.