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

  ERROR - A DEF function definition is not allowed in a  WHEN  block  or
  its  associated  handler.   Remove  the  DEF  function definition from
  within the WHEN block or handler.