[pstricks] pst-solides3d and plain TeX

[Adam Fenn]

Can pst-solides3d run under plain TeX? When I  \input pst-solides3d I 
get the  message

! Undefined control sequence.
\pst at solides@reservednames ...1\endcsname } \@for
                                                   \name :=\@tempa \do 
{\expa...
l.200 \pst at solides@reservednames{action}

The LaTeX examples work fine on my system so I think I have all the 
right files..

Thanks for your help,
Adam Fenn.