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

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



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.

Product Version: Not Selected
newcallstack.txt (3.6 kB)
newlog.log (30.9 kB)
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asked Mar 12 '15 at 03:54 AM in Bug Reports

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John Alcatraz
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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!


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answered Mar 12 '15 at 10:10 AM

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MieszkoZ STAFF
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avatar image John Alcatraz Mar 12 '15 at 05:07 PM

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

avatar image John Alcatraz Mar 16 '15 at 08:10 PM

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

avatar image MieszkoZ STAFF Mar 17 '15 at 12:59 PM

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

avatar image Stephen Ellis ♦♦ STAFF Mar 20 '15 at 03:14 PM

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

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