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

 unable to access stack to depth of depth

    Facility: DEBUG, VMS Debugger

    Explanation: The debugger is trying to access the register set of
    a frame depth frames down on the stack.

    User Action: If you explictly requested for information about
    that frame, (e.g. via a previous SET SCOPE command), modify your
    command such that it is requesting information about a valid
    frame.