I wrote
> But trying parametric{function{}} object has so far given a
> consistent Windows "Illegal operation" and aborting of
> MegaPov  very quickly after hitting "Run".
[ ... ]

The next snippet gives trouble
( "MegaPov attempted illegal operation"):
//////////////////////////////////////
#declare parametrictest=
    parametric
     {
       function
        f( u,v),
        g(u,v),
        h(u,v)
       <-6,-6>,<6,6>
     }
object{
     parametrictest
}
///////////////////////////////////

But not:

object{
     parametric
     {
       function
           f( u,v),
           g(u,v),
           h(u,v)
          <-6,-6>,<6,6>
}

And something about this sure seems familiar, from earlier
Superpatch use.

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