/sys$common/syshlp/helplib.hlb SHOW, ERROR, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  $ SHOW ERROR
  Device  Error Count
  CPU:         2
  MEMORY:      1
  DBB1:        9

      The SHOW ERROR command displays the error count for all devices
      with error counts greater than zero.