The users are all identical in their setup.
If I fully type out the command featuring a table/procedure/etc in that schema, it works without issue, but if I rely on code assist it does not work. Also, rather oddly considering what i've just said, if I try to compile something in my schema referencing something in the other, then it is unable to see it.
I've tried the same thing from Oracle SQL developer, and it has no such issue. Compilations work, code-assists works.
Would a copy of debug.txt give you any further insight? Let me know where I can email it.
Thanks.