Is it possible to propagate all the signal attributes of inports and outports? My question step-by-step: 
1. In the last level of nesting I defined all necessary attributes: 
2. I made a Subsystem from it: 
and then I want that signal attributes from inports and outports propagate automatically from the Subsystem (lowest nesting level) to the next level. 
Now I have to define Bus type also for Out1 but I defined it in Subsystem, but it didn't propagate to the higher level and I got an error which forces me to specify a bus data type: 
Is it possible to automatically propagate the inport and outport attributes to the higher level or I need to define signal attribues for inports and outports manually (including inport and outport name?)