The OBJ layer , is for collecting footage purposes, its another layer that you can hide. If you are experiencing issues with importing OBJ , this is usually has to do with some missing information in the file such as UV info or flipped Normals (you can assign some UV’s and Flip the normals also inside Stardust , but its always better to have an import ready Model) . Please send us an email with the file and we could have a look at it.
 

I do have the same issue,  the .obj loads in object viewer,  trapcode form,  but won’t load in stardust
is there a limit in file size?  
 
regards
 

same problem here