Dear all, I find that when there is an error (at least, "undefined control sequence") in a file included using \component, the supposedly erroneous lines printed are from the calling file, not the file where the error actually is (although the line number seems correct, and there are clues where the error really lies). Minimal example ... file1.tex: \startproduct file1 \starttext Bla bla bla. Bla bla bla. Bla bla bla. \component file2 \stoptext \stopproduct file2.tex: \startcomponent file2 Bleh bleh bleh. Bleh bleh bleh. Bleh bleh bleh. \zorg \stopcomponent When I run "context file1" I get an error: ... ConTeXt ver: 2010.10.12 01:03 MKIV fmt: 2010.10.12 int: english/english ... systems : begin file file1 at line 1 systems : begin file file2 at line 6 (file2.tex ! Undefined control sequence. system > error on line 5 in file file1.tex: Undefined control sequence ... 1 \startproduct file1 2 \starttext 3 Bla bla bla. 4 Bla bla bla. 5 >> Bla bla bla. 6 \component file2 7 \stoptext 8 \stopproduct l.5 \zorg If I replace \component with \input in file1.tex, all works correctly and the error ("\zorg") is correctly pointed out. Best, Robin