DataSmith Import to UE4 from sketchup missing pieces and textures

Development Asset Creation
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1

Hi, Im kinda knew to UE4 so If you have the answer to this Question please be specific for what do! What am I using?: I installed the DataSmith Plugin to Ue4 plus the Sketchup Pro 2018 Datasmith Exporter plugin. My Issue is, when I Import the Exported Sketchup Datasmith File, not all of my textures or Building components are there! Can Anyone help? Thank you!

Here are some photos of what I mean.

Sketchup Image: Screenshot - 143c072ac411b30fab739d325ba626ff - Gyazo

UE4 Problem: Screenshot - fb964f0784a1a1793de0701145a00eb5 - Gyazo

2

I have same problem. Some parts dont visible in UE4. Etc. a wall is can visible one side but not at other side. I tried to make component dont affect. Changed textures, draw again , copy and paste new SU file, save as .dae and opened in SU than exported to datasmith… (Sorry for spelling.)