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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">After retyping most of the file I god rid of the error messages - but I get only an empty image!?</font></div>

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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\listfiles</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\documentclass[pstricks]{standalone}</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\usepackage{pst-solides3d}</font></div>

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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\UseRawInputEncoding</font></div>

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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\begin{document}</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\def\A{3.0}</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\def\B{0.5}</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\begin{pspicture}(-3.5,-3.5)(3.2,13)</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\psset[pst-solides3d]{viewpoint=20 -20 30 rtp2xyz,Decran=15,lightsrc=viewpoint}</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\defFunction[algebraic]{shell}(u,v){\A*cos(u)*sin(v)}{\A*sin(u)*sin(v)}{\A*(cos(v)+ln(tan(v/2)))+\B*u}</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\psSolid[object=surfaceparametree,linecolor={[cmyk]{1,0,1,0.5}},base=0 pi 8 mul 0.1 2 fillcolor=yellow!50,incolor=green!50,function=shell,linewidth=0.5\pslinewidth,ngrid=100 50]</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\end{pspicture}</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#0000DD" style="font-family:Arial;font-size:10pt;color:#0000DD;">\end{document}</font></div>

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