VMS Help UIL, Compile Time Errors, GADGET_NOT_SUP  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  WARNING:  The indicated  object  type  does  not  support  a  gadget
  variant;  only  a  widget variant is supported for this object type.
  The UIL compiler ignores the gadget indication, and creates  widgets
  of this object type.

  USER ACTION:  Specify that this object type is a widget instead of a
  gadget.