[4.7.3] Engine crashes when hitting play, NavMesh Fatal Error

Development World Creation
, , , , , ,
1

I am back with a new crash. Same procedure as every crash.

I get an Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000d60 in UE4Editor-Engine.dll!UNavMeshRenderingComponent::GatherData() (0x000007fed4397b2a) + 19 bytes

Callstack

Log

In the callstack you see it is some kind of Error with the NavMesh… What have I done before I get the crash? I created an auto convex collision for one of my meshes. I have not edited anything regarding the navmesh. Well, I have turned on and off the drawing of the NavMesh multiple times.

2

Hey John,

The callstack indicates you have RecastNavMesh's instance bDrawPathCollidingGeometry set to true. Can you check if you’re experiencing the crash once it’s disabled? This will help me apply a proper fix, so thank you in advance!

–mieszko

3

Hi Mieszko, thanks! Once I disable bDrawPathCollidingGeometry it stops crashing.

4

do you think a fix for this will be in 4.7.3?

5

4.7.3 is already wrapped up, but it should be in 4.7.4 if it ever ships. If not then 4.8

6

For the record, this is logged as UE-11997 and will most likely be included in a 4.7.4 hotfix.