I guess that is true if you load both road connections in the map editor (ROEXall-PM251-PR244 RC V2 and ProMods 2.51_RusMap 2.3.1_PL_Rebuilding_2.4.4 Road Connection), at the same time. But it should not lead to a crash if you only load ROEXall-PM251-PR244 RC V2 in the map editor. Am I correct about this?
Did you use V1 or V2 of the ROEXall-PM251-PR244 RC? I used V2 which I found here. But in your game.log I don't see V2. So I guess you are using the old version?This is my gamelog loading Normal Combo...feel free to find your error in it...if you can. Maybe some outdated files in your part?
Apart from that I checked my mods to see if any of them is outdated, but I didn't find any outdated mods.
Ultimately I disabled ROEXall-PM251-PR244 RC V2 and I enabled ProMods 2.51_RusMap 2.3.1_PL_Rebuilding_2.4.4 Road Connection. This time I have no crashes. Not west of Warsaw, not northeast of Warsaw.