Ok, you got me curious. How does TeX know what application wrote the file if it's not "to do with" the contents of that file?
Sorry, I was referring to the one-line source file \input texinfo @bye As for the .fmt file, yes, it surely records whether tex, etex, pdfetex, etc., was used to generate it. Hence the error. Ralf, what is the output if you run tex \\end from the command line? Also etex \\end and pdfetex \\end This is e-TeXk, Version 3.141592-2.2 (Web2C 7.5.4) This shows that texi2dvi is invoking etex. This is pdfeTeXk, Version 3.141592-1.21a-2.2 (Web2C 7.5.4) (INITEX) This shows that mktexfmt is invoking pdfetex to build etex.fmt. This mismatch is causing the error. This is controlled by the file fmtutil.cnf. What does that file look like in your installation? -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/