Hi, the pgfplots module t-pgfplots.tex lacks an \unprotect \protect pair, which causes a catcode error in the file numtable/pgfplotstable.code.tex on lines 1042-1045: { \catcode`\^^I=12 \gdef\pgfplotstablesave@impl@TAB{^^I} } Suggested fix: --- texmf-modules/tex/context/third/pgfplots/t-pgfplots.tex~ 2012-04-24 10:01:24.972183906 +0200 +++ texmf-modules/tex/context/third/pgfplots/t-pgfplots.tex 2012-04-24 10:03:13.712723135 +0200 @@ -27,6 +27,8 @@ \usemodule[tikz] \usetikzlibrary[plotmarks] +\unprotect + \edef\tikzatcode{\the\catcode`\@} \edef\tikzbarcode{\the\catcode`\|} \edef\tikzexclaimcode{\the\catcode`\!} @@ -61,4 +63,6 @@ \catcode`\|=\tikzbarcode \catcode`\!=\tikzexclaimcode +\protect + \endinput I don't know who is responsible for that and if it needs to be fixed upstream or if the module is a part of ConTeXt. Best wishes Marco Patzer