...and if your files contain relative paths, where should they start? I've seen files taking these possible options:

1) Starting with :Runtime:... like this:

   figureResFile :Runtime:Geometries:...
   reflectionMap ":Runtime:Textures:...

2) Starting with the directory inside Runtime:

   figureResFile :Geometries:...
   reflectionMap ":Textures:...

3) Sometimes even taking it one level further:

   figureResFile :Creator:...
   reflectionMap ":Creator:...

In my experience, the third case almost always causes problems, and the second case sometimes does. If I ever find troublesome files I always edit them to use the first case (which might, I suppose, be what's meant by "absolute path" in this thread?).

Of course, very occasionally full absolute paths like "C:......Runtime...." turn up, and they always cause trouble... ;)