I have an image folder Terschelling with sub-folders used to generate this album.
The root folder contains 4 project files for my 4 skins.
Because this leads to a “Are you sure?” pop-up if I use the Multi maker, I decided to make separate folders for the 4 skins.
So I made inside the main folder Terschelling a new folder Terschelling_PS and copied the PhotoSwipe project file to this new folder. (I think I copied also folder .jalbum). Next I opened this project file and made links to root images and to the image sub-folders in the main folder Terschelling.
After I clicked the Make button, the album with the sub-folders was made, but after all images were made, jAlbum was hanging. I had to use the task manager to exit jAlbum. However no thread-dump.txt was made.
Next I excluded the last used folders in the project, but that did no help: the same hanging jAlbum program.
Next I opened the original PhotoSwipe project file in the main folder Terschelling. This was always working without problems, but now it was also hanging at the end of the make. This was done with the version 29rc1, but I had the same problem with the latest released version.
Next I copied the Terschelling folder from my backup disk, opened the original PhotoSwipe project file in the main folder and made the album without problems.
Next I made a new folder Terschelling_PS outside the main folder Terschelling and repeated the procedure given above. Now I could make the album without problems!