Hello all, the following mp-snippet ... gsave newpath 4.5 21.1875 moveto 3.7973 20.87306 3.16096 20.42763 2.625 19.875 curveto 1.91222 19.14006 1.3963 18.23721 1.125 17.25 curveto [0.99834 0.5764 -0.05766 0.09985 0 0] concat stroke grestore ^^^^^^^^ 0.123 0.018 0.007 setrgbcolor ... leads to ... Transcript written on window-mpgraph.log. [MP to PDF] (./window-mpgraph.1 ! Missing number, treated as zero. <to be read again> [ \@@MP41 ->[ 0.99834 \presetMPconcat ->\dimen 0=\gMPs 1 \onepoint \dimen 2=\gMPs 2\onepoint \dimen... \handleMPpathconcat ->\presetMPconcat \PDFcode {\gMPs 1 \gMPs 2 \gMPs 3 \gMP... \dohandleMPpathB ...catMPpath \handleMPpathconcat \else \ifx \somestring \PS... l.148 ...9834 0.5764 -0.05766 0.09985 0 0] concat stroke grestore ? pdfeTeX, Version 3.141592-1.30.0-rc3-2.2 (Web2C 7.5.5) ConTeXt ver: 2005.07.20 fmt: 2005.7.20 MetaPost, Version 0.901 (Web2C 7.5.3) I hope this information is enough (else I'm really in trouble to generate a minimal example). Greetings, Peter