AFAIK, an AooB issue has nothing to do with the OBJ file.The issue is in your BP. Can you show us the BP? Specifically the array you are using.
AooB means that you are trying to access an index that is larger than the array size.
As you said, the OBJ file imported fine. Try dropping the imported mesh into the scene as a static object (no BP). That too should work fine.
Models on TurboSquid are hit or miss.
That model has 141K polygons. From what I see in Blender, the object has only polygons and not triangles. You need to triangulate the mesh before importing.
Have you tried to view the model in 3D software such as Maya or Blender? I would recommend you do that first.
I trust you have imported other OBJ files successfully?
Hello,
I’ve tried to import a couple of different OBJ files into my game project and some of the more simple ones seem to work fine. However, when I try to import some, the import works fine and dandy and I can display it in the editor and edit them in BP but when I start the game it immediately crashes and gives me the exception “Array out of bounds” in VS.
Does anyone know why it does this and how I can fix it?
This one makes the engine throw the exception: free obj mode viper mk-iv
I tried just putting the OBJ files straight into the level aswell. It crashed then too.
With the same exception. I really don’t understand this.
Yeah, I’ve imported other OBJ files successfully.
I don’t really know how to use tools such as Maya or Blender (hence why I resort to free 3D placeholder models online for now). I’m a programmer at heart. 
I am a programmer, and I assure you, 3D modelling is not programming. These are very different disciplines. 
The model is not set up properly for direct import. I don’t think UE4 will triangulate a mesh on import, but I may be wrong…
I always triangulate these meshes before importing. I believe your mesh will need a bit of custom work before you can import it into UE4.
If you’re going to be working with 3D models, I highly recommend that you familiarize yourself with Maya or Blender (which is free). There are plenty of tutorials online.
The thought was to have someone else do the 3D modeling but I sort of need some stand-in models for now so I can get a good atmosphere of what the level is like. How long would it take for someone to do that work to make the stand-in model work and how much would I have to pay them (approx.)?