Opening 4.27.2 project with 5.0.3 lightbuilding issues other editor view materials

Development Asset Creation
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1

In 4.7.2 I’ve no light build issues. But if I open the same project with 5.0.3, which will create a copy, light buidling fails and shows those in the message.log:
LogLightmassSolver: Warning: Failed to open channel for material data for D5493D2047EECBF0F469E98A1C9CC2B8: /Game/VictorianExteriors/Materials/Glass/M_Glass_01.M_Glass_01
LogLightmassSolver: Warning: Failed to open channel for material data for 6C695333473D9589F905EF8C4DCCE83A: /Game/VictorianExteriors/Materials/Walls/Plaster/MI_Paint_Plaster_01_01.MI_Paint_Plaster_01_01
LogLightmassSolver: Warning: Failed to open channel for material data for B9FB4CB44932C5845547169B1D429CD1: /Game/VictorianExteriors/Materials/Walls/Bricks/M_Exterior_Bricks_01.M_Exterior_Bricks_01
LogLightmassSolver: Warning: Failed to open channel for material data for A2EAF6AC4095292272C59591C7884861: /Game/VictorianExteriors/Materials/Concrete/M_Concrete.M_Concrete
LogLightmassSolver: Warning: Failed to open channel for material data for 0332794B41B409B7B7AB77BA488A13D4: /Game/VictorianExteriors/Materials/Wood/M_Wood_01.M_Wood_01
LogLightmassSolver: Warning: Failed to open channel for material data for E7D065E14588675F5F5092A8D13B0CEE: /Game/VictorianExteriors/Materials/Walls/Plaster/MI_Paint_Plaster_01_07.MI_Paint_Plaster_01_07
LogLightmassSolver: Warning: Failed to open channel for material data for 6EAB8B224A6F8B15759F19BDF8EACBE3: /Game/VictorianExteriors/Materials/Metals/M_Cast_Iron_Metal.M_Cast_Iron_Metal
LogLightmassSolver: Warning: Failed to open channel for material data for E572A3504467FE3C9105B0A5220D8806: /Game/VictorianExteriors/Materials/Roof/MI_Tiles_01_01.MI_Tiles_01_01
LogLightmassSolver: Warning: Failed to open channel for material data for 48388E1948D3A4AA81EC92AA0D83DAC0: /Game/VictorianExteriors/Materials/Walls/Plaster/MI_Paint_Plaster_01_02.MI_Paint_Plaster_01_02
LogLightmassSolver: Warning: Failed to open channel for material data for 13F968D945BA7180F49A3786A090A3E8: /Game/VictorianExteriors/Materials/Columns/M_Classical_Doric_Column.M_Classical_Doric_Column
LogLightmassSolver: Warning: Failed to open channel for material data for 827F61924C02FFFEE24CB1B8A0C2E79B: /Game/VictorianExteriors/Materials/Walls/Plaster/MI_Paint_Plaster_01_04.MI_Paint_Plaster_01_04
LogLightmassSolver: Warning: Failed to open channel for material data for 078B568246447D0DD91523BB2165F62B: /Game/VictorianExteriors/Materials/Metals/ExteriorLamp/M_Cast_Iron_Metal_Exterior_Lamp_01.M_Cast_Iron_Metal_Exterior_Lamp_01
LogLightmassSolver: Warning: Failed to open channel for material data for 612A2705499601DD6C5ACDAD89179761: /Game/VictorianExteriors/Materials/Metals/ExteriorLamp/MI_Cast_Iron_Metal_02.MI_Cast_Iron_Metal_02
LogLightmassSolver: Warning: Failed to open channel for material data for 76DF1B404F88EE8D35279E8FF7F4C4B7: /Game/VictorianExteriors/Materials/Lamps/Lights/MI_Light_Bulbe_01_01_ON.MI_Light_Bulbe_01_01_ON
LogLightmassSolver: Warning: Failed to open channel for material data for 19E488554E5DCD48724E8B83A5402C2C: /Game/VictorianExteriors/Materials/Glass/M_Dirty_Glass_01.M_Dirty_Glass_01
LogLightmassSolver: Warning: Failed to open channel for material data for 412663634E494B5D881CCBAAD5EAFD0C: /Game/Ivy_Foliage_Pack_4K/Materials/M_IvyFoliage_Wind_Inst.M_IvyFoliage_Wind_Inst
LogLightmassSolver: Warning: Failed to open channel for material data for C43710EC41C58373686C04BB660E98AD: /Game/VictorianExteriors/Materials/Walls/Concrete/MI_Concrete_Bricks_01.MI_Concrete_Bricks_01
LogLightmassSolver: Warning: Failed to open channel for material data for 6B14AE8B4C72B830B3EE98B89B77D32A: /Game/Speakeasy/Materials/MI_Picture_Frames.MI_Picture_Frames
LogLightmassSolver: Warning: Failed to open channel for material data for 9B1A69AE4361B8AE0B26BB91124F8517: /Game/Speakeasy/Materials/MI_ArtWork_1.MI_ArtWork_1
LogLightmassSolver: Warning: Failed to open channel for material data for D35835D947D66EB3D56BAB9E4FA243B0: /Game/Speakeasy/Materials/MI_ArtWork_2.MI_ArtWork_2
LogLightmassSolver: Warning: Failed to open channel for material data for B38D82BF4200C7311B60C2B131713CF1: /Game/Speakeasy/Materials/MI_ArtWork_3.MI_ArtWork_3
LogLightmassSolver: Warning: Failed to open channel for material data for 33D6CD2141D40CFE568A57A2C974C09A: /Game/VictorianExteriors/Materials/Metals/ExteriorLamp/M_Cast_Iron_Metal_Exterior_Lamp_02.M_Cast_Iron_Metal_Exterior_Lamp_02
LogLightmassSolver: Warning: Failed to open channel for material data for A0A3BA6B4E32539D2A0907A50B8474C9: /Game/VictorianExteriors/Materials/Metals/ExteriorLamp/M_Cast_Iron_Metal.M_Cast_Iron_Metal
LogLightmassSolver: Warning: Failed to open channel for material data for 534AC8B2430F1B5E04309582BEE77FD0: /Game/VictorianExteriors/Materials/Metals/MI_Golden_Metal_01.MI_Golden_Metal_01
LogLightmassSolver: Warning: Failed to open channel for material data for 1F04A21E47812886E6CB9CAAC05FC81A: /Game/VictorianExteriors/Materials/Metals/ExteriorLamp/M_Cast_Iron_Metal_Exterior_Wall_Lamp_Base.M_Cast_Iron_Metal_Exterior_Wall_Lamp_Base
LogLightmassSolver: Warning: Failed to open channel for material data for 7761981C4A02A75596244F861814DB7C: /Game/VictorianExteriors/Materials/Walls/Plaster/MI_Paint_Plaster_01_05.MI_Paint_Plaster_01_05
LogLightmassSolver: Warning: Failed to open channel for material data for 61BEAF10406A80A765EF708F731CF6B0: /Game/Biagitown_night.Biagitown_night:PersistentLevel.BP_CarSedan_2.Mesh.MaterialInstanceDynamic_0
LogLightmassSolver: Warning: Failed to open channel for material data for 789B868E4A5D2A87C121D4976FE8C46F: /Game/EuropeanAlleys/Materials/MI_PlasticC.MI_PlasticC
LogLightmassSolver: Warning: Failed to open channel for material data for CFA9832D4F8F60E1DAAF00824F6AA26E: /Game/EuropeanAlleys/Materials/M_Glass.M_Glass
LogLightmassSolver: Warning: Failed to open channel for material data for D7A4C3A1478A1E8D3D84649E9AF1067A: /Game/EuropeanAlleys/Materials/M_Chrome.M_Chrome
LogLightmassSolver: Warning: Failed to open channel for material data for 571892FE484AEC35542ED59E2084D3D3: /Game/EuropeanAlleys/Materials/M_CarDetailsB.M_CarDetailsB
LogLightmassSolver: Warning: Failed to open channel for material data for 6E848A5C457F3BD52B4E6FB82744DB0D: /Game/EuropeanAlleys/Materials/M_Silhouette.M_Silhouette
LogLightmassSolver: Warning: Failed to open channel for material data for 2FFD248E4DD6AF6E333555831BED84FD: /Game/VictorianExteriors/Materials/Nature/M_Bush_Leaves.M_Bush_Leaves
LogLightmassSolver: Warning: Failed to open channel for material data for 684EB5AD4DB520A4BD95DFA51E437016: /Game/VictorianExteriors/Materials/Nature/M_Picea_Abies_Trunk.M_Picea_Abies_Trunk
LogLightmassSolver: Warning: Failed to open channel for material data for FD1AF5824C880F10ED19169B117D74E3: /Game/Street_Decorations/Material/MI_Fence_post_03_Inst.MI_Fence_post_03_Inst
LogLightmassSolver: Warning: Failed to open channel for material data for 6349639542692D1B80095AAE8B078395: /Game/Street_Decorations/Material/MI_Fence_03_Base_Inst.MI_Fence_03_Base_Inst
LogLightmassSolver: Warning: Failed to open channel for material data for C0CCBB9A43EC3C810E60979DBCA92E6A: /Game/Street_Decorations/Material/MI_Fence_03_Leaves_Inst.MI_Fence_03_Leaves_Inst
LogLightmassSolver: Warning: Failed to open channel for material data for C739F0114394681D15AAA4BB4B1A4AF6: /Game/Street_Decorations/Material/MI_Fence_03_LOD_Inst.MI_Fence_03_LOD_Inst
LogLightmassSolver: Warning: Failed to open channel for material data for F52A6788461193567923A78B84F0D611: /Game/Biagitown_night.Biagitown_night:PersistentLevel.Ultra_Dynamic_Sky_6.Ultra_Dynamic_Sky_Sphere.MaterialInstanceDynamic_0
LogLightmassSolver: Warning: Failed to open channel for material data for 680FDB7B4B0C07CDCA959F847F651AED: /Game/Buildings/AbandonedBar/Materials/MM_BlackFill.MM_BlackFill
LogLightmassSolver: Warning: Failed to open channel for material data for 2211EE944B91F68BE80398AB36123935: /Game/VictorianInteriors/Materials/Floors/Ceramic/MI_Marble_Ceramic_Floor_01_05.MI_Marble_Ceramic_Floor_01_05
LogLightmassSolver: Warning: Failed to open channel for material data for 8F9959464AA2D3093C824A96FDF26E3A: /Game/VictorianInteriors/Materials/Floors/Ceramic/M_Marble_Ceramic_Floor_01.M_Marble_Ceramic_Floor_01
LogLightmassSolver: Warning: Failed to open channel for material data for 8E4B0EE04534176922BED5A277A30EBA: /Game/VictorianInteriors/Materials/Walls/Plaster/MI_Paint_Plaster_01_06.MI_Paint_Plaster_01_06
LogLightmassSolver: Warning: Failed to open channel for material data for 09F57B8A419B65A960BD48A326CFF96F: /Game/Office_Vol_1/Materials/Carpets/MI_Carpet_004.MI_Carpet_004
LogLightmassSolver: Warning: Failed to open channel for material data for AF6382554DBBE7154AD81F824497DB4A: /Game/VictorianExteriors/Materials/Concrete/MI_Concrete.MI_Concrete
LogUObjectHash: Compacting FUObjectHashTables data took 1.14ms
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13
LogLightmassSolver: Warning: Error, AddTask failed with error code -13

I’ve recreated this issue by doing the same process again.
What it does as well that some of the same materials from one asset from marketplace I bought are fine with 4.7.2. But with 5.0.3 some of these materials are not shown in the editor instead the worldgridmaterial. Despite the material actually exist.

5.1 I haven’t tried yet due to the missing plugin of substance, but I may try just to see, what happens.
I haven’t come across such an issue with previously going to higher versions.

2

Hey @ThornMcNoodles!

4.7.2 to 5.0.3 is a pretty big leap (~21 engine versions). Have you tried moving your assets to a later version of Unreal Engine 4 first and then moving to 5.0?

However, generally speaking, you should stick with the versions the assets you bought were made for. What engine versions do they support? Have you reached out to the seller?

3

I’ve reached out.

Concerning version. 4.27.2 to my knowledge is the last version till 5.0. The assets are supported for 5.0.

What I did now, is to open it with 5.1. Strangely enough, I didn’t get the same issues. I found straight forward, which asset was stopping to build the light in 5.1. Basically, a higher version and less issues it seems.

Edited the post. I typed version wrong. My bad. 4.27.2

4

Hey @ThornMcNoodles!

That is really odd. Since it supports 5.0, have you tried directly installing the assets through the EPIC games launcher? Though if 5.0 was where you wanted to be anyway, great!

5

Hi @Quetzalcodename !

It’s unfortunately a map I created and would not like to rebuild it from scratch. I’m continuing with 5.1. I’ll need to redo some collisions etc, but I can live with that.

5.0.3 I had another issue. When I tried to migrate my map to the FPS project, it would use up to 98% of my RAM, which in total is 64 GB. It would end with a crash saying that I run out of GPU memory. The same steps with 5.1 I didnt do it. It went smooth. I read somewhere to skip version 5.0.3 that it’s better to simply go to 5.1.