Library /sys$common/syshlp/basichelp.hlb Run time errors, DUPKEYDET  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Duplicate key detected (ERR=134)

  In a PUT operation to an indexed file, a duplicate key was  specified,
  and  DUPLICATES  was  not specified when the file was created.  Change
  the duplicate key or re-create the file specifying DUPLICATES for that
  key.