cannot get file-id for image file opened on channel channel-number

    Facility: DEBUG, VMS Debugger

    Explanation: An error occurred while trying to get the file-id
    of the image file opened on channel channel-number. The reason is
    given in the message following this message.

    User Action: Correct the problem given by the messages following
    this message. If the problem cannot be solved, submit a Software
    Performance Report.