POV 3.5 RC2 icl on WinNT Sp 6 PII 233 with 128 MB

I have reported several porblems around splines in RC1in some thread last week
but they were probably a little trivialized becouse of "still being worked on"
status. Now Splines are on "Fixed bugs" list so I can focus some things.
For tests I have used the same source I posted in
http://news.povray.org/m7fq3u41ctia9e6i3tbnlstn6ek739vpke%404ax.com
but I only limited range in Draw() macro from:
      #local c=1;
      #while (c<=(Points-Step))
      :
      sphere{Spline(Points Force()) Radius}
to:
      #local c=2;
      #while (c<=((Points-1)-Step))
      :
      sphere{Spline((Points-1) Force()) Radius}
becouse of smaller number of "real" points for cubic spline.

Experimenting script was designed to render two rows of spline in following
order:
    linear cubic cubic linear forced_cubic 
    cubic linear linear cubic forced_cubic

So problems are now:
- forcing cubic_spline at moment of calculation not work - that's probably
  bug in parser becouse it not accepts cubic_spline where it expects
  cubic_spline - error is:
      ,cubic_spline <----ERROR
      Parse Error: linear_spline, quadratic_spline, natural_spline,
      or cubic_spline expected.
  for further tests I commented content of Force() macro to not force
  cubic_spline then
- first column - pure definition - works fine
- second column - copying spline with changing type and all points
  redefinition - works wrong
- third column - copying spline with changing type - works wrong
- fourth column - copying spline with additional point - works fine
- fifth column - forcing type at calculation time - can't be tested becouse
  described above bug

ABX

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