Dear List, I am experiencing a strange problem. I have a project, essentially with the following structure (desperate attempt to keep track of my stuff): mainfile.mkiv: % BOF ...lots of setups and settings... \starttext \input metapostgraphics.mkiv \input chapter1.mkiv \input chapter2.mkiv \input chapter3.mkiv \stoptext % EOF I generate the PDF with 'context mainfile.mkiv' So far for the structure. Now my problem: metapostgraphics.mkiv contains several (4) metapost graphics with \startuseMPgraphics{nameX} ... \stopuseMPgraphics. In chapter2.mkiv I want to use them with \useMPgraphics{nameX}. It worked well until today, when I added a fifth graphic. Then I suddenly get a frame with 'undefined' inside instead of the picture. I tried everything, checked for typos, tried different names, double checked the MP-code etc. but to no avail. It only works if I put the exact same MP-code between \startMPcode \stopMPcode directly in the chapter2.mkiv What is wrong here? Am I missing something? Did I get the input mechanism all wrong?