Library /sys$common/syshlp/dbg$help.hlb DEBUG, Messages, READERR  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 debugger input read error; session may terminate

    Facility: DEBUG, VMS Debugger

    Explanation: Excessive read errors have occurred from the
    input command stream. The Debugger may exit after printing this
    message.

    User Action: Check the physical integrity of the device
    containing the input stream. Also check that the input buffer
    is large enough to handle the input stream or reduce the rate of
    command entry.