>>>>> "H" == Hans Aberg <[log in to unmask]> writes: H> Are there any reasons for LaTeX having multiple AUX H> files? They are only necessary in an \includeonly scenario. Some system state (counters only at this point) from the UNincluded files is stored in the aux files. Otherwise they would be overwritten. Unless this information were recognized in the sole aux file and resaved when the part is not included. I tried coding this. It wasn't hard to get almost right. If you abort LaTeX in the middle of an included file, you are in trouble because you are left with an unclosed group in your aux file. See my accompanying post and pointer to the code and documentation of my partial solution.