Afterwards I deleted a fair bit of the unused material but when I load the project again I keep getting messages saying that the item could not be found.
Unfortunately it does not show these unfound items in the medium content list and I can therefore not remove them from the library. How can I clean up the pds file to remove the items that cause the warnings about unfound material.
I found something called "Remove all unused items from library" but cannot find any information online about what that does exactly.
Is that the option to use? I'm afraid it might do something I do not expect. It would be easier if the missing items would be shown in the medium content list with an icon with a cross through it or something, so I can remove them manually.
Any suggestions?