This is never okay in a library.txt file:
EXPORT lib/something.obj ../opensceneryx/object.obj
This is a library path that refers to a file outside its own pack by using ../ to go up a directory and hopefully find that OpenSceneryX is installed, at which point it assumes that it knows the internal layout of OpenSceneryX and exports the object.
Do not do this.
This will become a warning as soon as I can write some code.
This will eventually stop working completely, because it's a terrible idea that I have said multiple times should never be done.