On a server where buildings are added at mission start, infected walk through closed doors of those buildings, even after the navmesh has been regenerated with the buildings in it. The buildings are added with CreateObjectEx(..., ECE_SETUP | ECE_UPDATEPATHGRAPH | ECE_CREATEPHYSICS | ECE_NOPERSISTENCY_WORLD) via DayZ Editor Loader.

After regeneration, infected correctly path around the buildings and through their doorways. Walls, interiors and props all work. But opening or closing a door on these buildings never changes the navmesh, so a closed door doesn’t block infected. The same building classes placed in the terrain (e.g. Land_Mil_Barracks2) block infected correctly when their doors are closed.

The 1.30 script comment above UpdatePathgraphEntityState in World.c mentions that “navmesh persistence for runtime structures” is a planned follow-up, so this may be the known gap. Server owners who add mapping have no way to make doors on those buildings work.

1. In a mission, spawn a building with doors at mission start, e.g. Land_Mil_Barracks2, using CreateObjectEx with ECE_UPDATEPATHGRAPH.

2. Regenerate the terrain navmesh with DayZDiag_x64 -server -startNavmeshDataServer, using the same mission so the building is present during generation. Load the new navmesh on the server.

3. On the server, close one of the building’s doors. Lure an infected to the other side.

4. Optional: call UpdatePathgraphEntityState(building) after the door closes and log the return value.

The closed door blocks infected pathing, the same as for terrain-placed buildings. UpdatePathgraphEntityState returns true and updates the door state.