> Let me put it like this. Until now, I've always been able to do this:
> But now, this gives me the error message:
> ! LaTeX Error: File `l3prop.sty' not found.
correct. This is because we finally removed the individual .sty files.
Initially, during the first phases of expl3 (when new datatypes got
added and a lot got changed or updated within those datatypes) it was
useful to have those as individual module files that could be loaded
individually (and replaced for testing etc) but once things stabilized
this became a problem as people loaded them in wrong order etc and we
had to try to maintain all kind of dependency rules between the
different files so that in the end normally most if not all of expl3 got
Therefore we announced way back that one should always load expl3 and
not any individual files.
and now we finally extract everything into a single file and the
individual files only exist on the source level (just like LaTeX2e where
you have many source files (.dtx) but only a single latex.ltx
So I guess you have to bite the bullet and remove the calls to
individual files as it really don't make any sense to provide empty .sty
files just to support the above scenario