Engine: Launch, Fatal error: attempt to build nav collision data for

anonymous_user_0f521b0a · July 21, 2015, 12:58am

I simply imported a default model into engine from Blender. Then when I tried to launch game, this message shows up every time, and I could not launch game.
Could anyone tell me how to fix this?
Thank you!

Delinx · July 22, 2015, 12:17pm

I have same trouble too )=

anonymous_user_33800a51 · July 24, 2015, 4:31pm

Hi ALTWang,

We moved this post into Bug Reports section, and assigned a member of our team to look into it for you. They will post here if they need any additional information. Thanks!

anonymous_user_0f521b0a · July 25, 2015, 4:56am

Thank you!

Delinx · July 25, 2015, 10:36am

I just did move all my meshes in one folder and press build few times and it helped, try it. But it’s definitely bug…

anonymous_user_b9532c9a · July 27, 2015, 6:09pm

Hi ,

Does this occur if you import your mesh into a clean, blank project with no additional content or is it limited to one project in particular? What steps are you taking to reproduce this on your end?

Delinx · July 27, 2015, 6:36pm

It’s happening in any project, including new clean projects.

anonymous_user_b9532c9a · July 27, 2015, 6:47pm

What steps do you take before this occurs? Is mesh in your level or in content browser only? Does this occur with any other meshes?

anonymous_user_0f521b0a · July 27, 2015, 6:59pm

I found that this problem is happening because mesh I import into UE4 doesnt have collision data, I applied collision to my mesh in my 3D software, and re-import into engine, it seems solved this error.

anonymous_user_b9532c9a · August 2, 2015, 2:21pm

Hi ,

We have not heard from you in several days. I am marking this as answered for tracking purposes. If you are still experiencing this error, please comment back with requested information.

anonymous_user_75773dff · August 29, 2015, 9:21am

Hi there! I have same problem. I am using only a box mesh imported from 3dsmax. I tried with autocollision, with a UCX mesh from max, and also removing collision and generating a new one in UE4. fatal error stills there… Any idea?

anonymous_user_b9532c9a · August 31, 2015, 2:47pm

Hi RodrigoMW,

Which engine version are you using and what steps are you taking to import box into editor? Does this occur in a clean, blank project with no additional content? Is it limited to one object?

anonymous_user_23c91a471 · June 11, 2016, 12:41am

I had same problem, I’ve managed to fix it. thing was that in my static mesh I had “nav collision” set to none but “has navigation data” was set to true, disabling “has navigation data” solved it I guess if you add “nav collision” it will fix problem as well. Hopefully this will help others having same issue