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ArmA 3 Terrain Builder, ArmA 3 Terrain Builder Support Forum

ErrorMessage: Too many objects in grid rectangle 1023,1023

One cause for this crash is that your road shape file has vertices / roads beyond the terrain builder mapframe range, aka outside the game world coordinates.

Fix it by, well fixing your roads, cut them again on Global Mapper, QGIS or manually in Terrain Builder (oh please no, no terrain builder) to make sure they are all inside the terrain area.