emacs 26.3. 2 different builds. 2 distinct OSs.
One build is custom inside Slackware; another build is standard issue from Fedora 32.
Results below are identical for both situations.
If the tex / latex source (or a symbolic link) resides in /tmp directory, everything from the tex mode menu functions as expected.
If the source is anywhere else in the directory structure, the first step, compilation (tex / latex), fails because it can *not* find the source file. Yet, if I use my own custom elisp script or invoke the relevant commands manually, there is *no* problem.
The builtin tex-mode.el script seems to expect all code to be only in /tmp or nothing will occur.
Am I missing something? A variable setting? Some other configuration aspect?
Thanks for your attention.
Guido