Jun.9
Using an old version of the terrain save (WM4031)and upgrading modules in the new version(WM4049) will cause the save to crash, killing a bunch of modules and macros at random and breaking all the threads.
After the old version of the project is saved and closed, the above situation is possible to occur if the project is opened with the new version.
My English is so bad so I use translation 
1 Like
Hi there,
That’s definitely not normal. At a guess, there is at least one device type for which the specific upgrade (old version to new version) is causing the broken world. This shouldn’t happen of course, but..
To track it down, you can update the devices one at a time instead of all at once, and see which one breaks things:
2 Likes