@Stahl-Opa finally achieved to not have errors in png files, but step 3 (adjacencies), mapmaker always get stuck.
Separated Scapa Flow (id 5) and Wick (id 2770)
I never ever had problems with the adjecencies...
But where do you run the mapmaker from?
The tools is really unszable if anything has acces to/do acces the map map files.
If you run it from a clouddrive, it will cause instability. Also if the (generating files) will be checked by an antivirus or any other tool.
So maybe this is also a problem for you? Try to deactivate all synchronization apps & tools like MEGA or Onedrive and check if the Antivirus scans the Mapmaker directory (and may stop it temporarly). Do not open any file from the Mapmaker dir, even if it's just a .txt.
At best, close everything else running on your system and try the MapMaker again
PS: Where do you have the attached file from?
Just checked my MapUtility, I do not use this file anywhere/do not have it.
Maybe just delete that .txt and try again?
WHich version of the map utility you do use? 1.2.5b is mine and seems working.