LPub3D - Submodel not shown in main model

[Jaco van der Molen]

Ah... indeed... Using accentuated character in paths or file names is something I generally avoid, as it often causes problems with programs written in countries where this situation doesn't occur and are thus not correctly tested. To a lesser degree, using space characters is to be avoided (very old programs were written in a time where space characters were not allowed!). Finally, I always configure my system to use '.' as decimal separator, it avoids me a lot of headaches too!

Yes. Characters with accents and diacritical marks are a problem, as for spaces are too as Philo points out.
Dots in file names other than the dot that separates the file extension (.dat, .ldr or .mpd) is to be avoided too. Use a - or _ instead.
Although that can give problems since the files LPub3D produces are often with a lot underscores too. I always use capital letters in a certain way to name files. I.e. FrontDoorLeft.ldr or something, rather than "left front door.ldr"
Also, very long paths can be a problem too. There was a time once the path (including the file name) exceded 255 characters crashes could occur too.
I could go on with warnings and exceptions...