Boolean problems

 From:  JL82 (JML82) 29 Oct 2017  (1 of 3) 
8651.1 
I have created the 3D-model by Moi3D v2. I tried to combine solids using boolean feature "Union". Why solids wasn't combining?
Attachments:
Attachmentpart1.3dm

Image Attachments:
Size: 550.3 KB, Downloaded: 32 times, Dimensions: 870x785px