I also don't understand that they are a * .gfa file (Aniblock ...), which is supposed to work. All the ones I have do work, all except this one. It is not that I care much, but it is very curious. A "gfa" file is compressed in binary, and I have not yet found a way to make them text. (It's supposed to be a "duf" or a "bvh" ... in theory, but I can't find the decompression / deflate algorithm.) It's a question to investigate, which is what I like: the holy code. 😀