<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">When calling the TAN function of pst-math it may happen that there is no access to the internal Div operator, see the following minimal example:<div class=""><div class=""><br class=""></div><div class="">\listfiles</div><div class="">\documentclass{article}</div><div class="">\usepackage{pstricks, pst-math}</div><div class="">\begin{document}</div><div class=""> \begin{pspicture}(1,1)</div><div class=""> \SpecialCoor</div><div class=""> \pstVerb{ 0 TAN /result exch def }</div><div class="">% \pstVerb{ /result { 0 TAN } def }</div><div class=""> \psdot(! result 0 )</div><div class="">\end{pspicture}</div><div class="">\end{document}</div></div><div class=""><br class=""></div><div class=""><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class="">Error: /undefined in Div</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class="">Operand stack:</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> 0.0 1.0</div></div><div class=""><br class=""></div><div class="">The problem doesn’t appear in the alternative (commented out) version. I am working on an iMac under Yosemite with TeXShop 3.57.</div><div class=""><br class=""></div><div class=""><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class="">*File List*</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> article.cls 2007/10/19 v1.4h Standard LaTeX document class</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> size10.clo 2007/10/19 v1.4h Standard LaTeX file (size option)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class="">pstricks.sty 2013/12/12 v0.60 LaTeX wrapper for `PSTricks' (RN,HV)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> ifpdf.sty 2011/01/30 v2.3 Provides the ifpdf switch (HO)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class="">pstricks.tex 2014/05/19 v2.54a `PSTricks' (tvz,hv)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class="">pst-xkey.tex 2005/11/25 v1.6 PSTricks specialization of xkeyval (HA)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> xkeyval.sty 2014/05/09 v2.6d package option processing (HA)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> xkeyval.tex 2014/05/09 v2.6d key=value parser (HA)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> pst-fp.tex 2014/05/19 v2.54a `PST-fp' (hv)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> xcolor.sty 2007/01/21 v2.11 LaTeX color extensions (UK)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> color.cfg 2007/01/18 v1.5 color configuration of teTeX/TeXLive</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> dvips.def 2014/04/23 v3.0j Driver-dependant file (DPC,SPQR)</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class="">pst-math.sty 2009/01/20 package wrapper for PSTricks pst-math.tex</div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""> ***********</div></div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""><br class=""></div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""><span style="font-family: Helvetica; font-size: 14px;" class="">What can be the reason?</span></div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""><span style="font-family: Helvetica; font-size: 14px;" class=""><br class=""></span></div><div style="margin: 0px; font-size: 12px; font-family: Menlo;" class=""><span style="font-family: Helvetica; font-size: 14px;" class="">Manfred</span></div><div class=""><br class=""></div></body></html>