So , i found something interesting.
When i supressed one of the features (closed corner) everything worked - all errors were "fixed" and i could recreate new ones.
I tried to edit feature , and i noticed that gap was 0.01 mm. After i changed it to 0.1mm everything worked.
0.01 is still a gap but when it is so small than corner is overlapping and i guess that was reason why this body was not valid to SW.
Still does not explain why everything is working at another pc, but i am little bit happy i found something.
Maybe until end of the week we can see what the route of the problem is
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)