<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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--></style></head><body lang=EN-NZ><div class=WordSection1><p class=MsoNormal>I have just updated MiKTeX and have found that pstricks (31-Dec-2017 build date) now appears to cause a problem. The error message I'm getting is<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>("C:\Program Files\MiKTeX 2.9\tex\generic\pstricks\pstricks.tex"<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>! Undefined control sequence.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>l.31 \if@check@engine<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Not sure what's happening here. If I stop pstricks from being loaded things work ok - apart from the obvious that pstricks doesn't work.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is there a known problem with the latest pstricks?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-----------<br>Paul Walker<br>Email: psw1959@yahoo.co.nz<br>Blog: https://antidismal.blogspot.co.nz/<br>SSRN: https://ssrn.com/author=638098<br>Book: "The Theory of the Firm" - http://tinyurl.com/z2gtcxm</p><p class=MsoNormal><o:p> </o:p></p></div></body></html>