> I've digged more into this, and I found that unix2dos doesn't fix > the problem, but just masks the tsort behaviour.
> If you point the tsort result into a file, you will notice, that tsort > breaks some of the newline chars. The input file seems to be ok. OK, I've worked on this. The input file is OK and the line breaks are correct too. What I've have seen previously is, that tsort is adding LF in the result file and is preserving the CRLF, so the file ends up with non consistent line endings. So we have two problems here: 1. tsort falsely reports loop 2. When working on input with CRLF it creats a mess with the line endings in the result file. I am still curious why tsort doesn't report those loops when I change the line endings to CRLF. Hope this helps! Ivan Ivanov