Is it at all possible to transfer a save game between two pak sets, for example between pak64 and pak 128?
That it not enable!
It give modells they can not be transfer from a pakset to another pakset!
All that can be used regardless of pakset is map - if you have downloaded any map (they are available on maps.simutrans.com), you can use it in any pakset. But games, themselves, cannot be transferred.
Some works, you shoudl be able to transfer a game without industry from pak64 to pak.ttd or pak.german. It may even work with pak128, although several buildings have other sizes.
If there were a proper compat.tab, many more such transfers should be possible. But this was never properly updated and only contains few entries.
Thanks for the replies! I'll give your suggestions a try.