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

 debugger must have input focus to accept paste operation

    Facility: DEBUG, VMS Debugger

    Explanation: A writeable debugger window and, if applicable, a
    text-entry field in that window must have the input focus before
    the selection can be pasted to it from the clipboard.

    User Action: Assign the input focus to a writeable window and, if
    applicable, to the appropriate text-entry field.