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

 cannot convert negative value to unsigned value at or near opcode_
 name

    Facility: DEBUG, VMS Debugger

    Explanation: The command is attempting to assign a negative value
    to an unsigned type. This is not allowed.

    User Action: Do not attempt to put a negative value into an
    unsigned variable.