@Severin
The message on the X1000 does not say much but if it has done, it would have been as obscure than on Sam440
The initial implementation of Hieronymus relies on a system feature that was not fully implemented on Sam440 and on X1000. That was fixed for the Sam440, let's say ... in Update 5. That is still not the case on X1000.
For the X1000, I developed a second implementation that works well on the MicroAOne but there is a problem with the X1000. But these days, I have thought that there is maybe a remaining hope. We will see after some tests.