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

 The !AC command is not allowed when analyzing a process dump

    Facility: DEBUG, VMS Debugger

    Explanation: The specified command may not be used within a
    process dump analysis.

    User Action: Do not use the command when analyzing a process
    dump.