stl Export for 3d printing

 From:  noskule
9020.1 
Hi All
I try to export an object consists of 2 parts to print the object with two materials. When I open the object in a slicer like repetier host it seams the the stl exporter merged the two parts together. The 2 parts have different names (object-1, object-2). The "merge object with the same name" is disabled hence it should not matter. Has anyone an idea how to properly export models for 3d printing having multiple parts in an object?
Best Regards Ben

EDITED: 1 Aug 2018 by NOSKULE