Hello Christian,

it seems the problem were Windows junctions. Like in:

import module namespace [...] at "file:///C:/Users/andreas/Eigene%20Projekte/XQuery/text-lib/src/regex-lib.xqm";
import module namespace [...] at "file:///S:/Users/andreas/Eigene%20Projekte/XQuery/text-lib/src/regex-lib.xqm";  

I have two volumes: an SSD and a magnetic disk. The magnetic stores many such folders, that consume a lot of space, like my home folder. I have a Windows junction from 'C:\Users\andreas\Eigene%20Projekte' to  'S:\Users\andreas\Eigene%20Projekte'. After I set all links to point to the same volume (the real, physical directory), it seems to be alright now.

Happy egg laying bunnies!

--
Minden jót, all the best, Alles Gute,
Andreas Mixich