Upgrading to engine 5.5.1 - error of "has an invalid runtime grid"

Development Programming & Scripting
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1

I upgrade to unreal engine 5.5 and I am getting an error during map check during build or delete hlod.

Here are the errors, how do I fix them?

Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_2_3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_1_2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-2_-1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_1_-1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-1_-4_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-4_-3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_3_-2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_1_-4_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-3_-4_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_1_0_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-2_-4_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-4_-2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-1_3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-2_-3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-3_-3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-1_-3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_2_1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-3_3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-2_3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-1_-1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-3_2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_0_-1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_3_-1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_2_-2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_0_-2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-3_-1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-1_2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-2_2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_2_2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-3_0_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_3_0_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-1_0_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_0_2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-4_1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_0_1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_2_0_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_3_-4_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_0_-4_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_1_-2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_0_3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-4_-1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_0_-3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-4_3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-3_-2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_3_2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_2_-3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-4_0_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_1_-3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_1_1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_2_-1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-4_-4_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-2_0_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-1_1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-1_-2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-3_1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-2_1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-4_2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_-2_-2_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_3_3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_0_0_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_3_-3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_1_3_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_2_-4_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Actor /Game/level2.level2_HLOD0_Instancing/level2_MainGrid_3_1_0_0 has an invalid runtime grid MainGrid:level2_HLOD0_Instancing 
Map check complete: 64 Error(s), 0 Warning(s), took 3.372ms to complete.
2

Greetings @AndyTriboletti!

Since you have just updated your UE version, this sounds like the exact scenario described in the short guide below. Essentially, you only need to rebuild your solution in Visual Studio, then re-open Unreal, the errors should have dissapeared.

3

thank you. I tried tools->validate data and now I can build the hlod.

1 Like
4

BOOM!!! thanks so much Andy…worked perfectly on a 5.4 to 5.5.1 project update ish…