Paris (U.E.), le 24/09/2017
Hi Oshyan
Well, I just rebuilt my library, and the problem went away (this time I left out billboards ans OBJ objects, as these can be seen, or used, outside of Terragen, and imported as the need arises). Thanks for solving the problem.
If I may, I have one suggestion. This is not the first time I rebuilt the library, and perhaps will it not be the last. Save for this time, I did so because I moved the objects the library was pointing to, to a folder on the same disk or partition, and the library did not update as a consequence. This is quite surprising from a Mac user's point of view (though in this case it would not have been a surprise, as the move was to another disk, and in that case aliases do not follow). Perhaps this behaviour could be implemented at a later time.
Merci
Hubert Holin