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

  Key size too large (ERR=145)

  The key length on a GET or FIND is either zero or larger than the  key
  length defined for the target record.  Change the key specification in
  the GET or FIND statement.