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

 no Debugger Symbol Table: no DSF file found and

    Facility: DEBUG, VMS Debugger

    Explanation: The information the debugger needs to allow you to
    debug this section of code is in an image file that could not be
    opened.

    User Action: Check for the existence of the specified file and/or
    its associated file protection attributes.