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

  ERROR - A detached HANDLER  definition  was  found  in  a  WHEN  block
  protected region or associated handler.  Remove the HANDLER definition
  from within all WHEN block protected regions and associated handlers.