MIXED MESHING IN SOLIDWORKS

I am a little bit frustrated with this problem i am trying to simulate a large frame as beam elements..as u can see a plate at bottom for the fixture purpose.i have defined all the contacts and simulation runs almost correctly...but when i see meshing it shows seprate parts ....why is it so can anyone help me with this...i want that my whole frame is supported by this particular fixture..

1 Answer

If this is an assembly, than it is possible that the parts are not properly connected to each other, if such combine all under single part.

I see no other reason for this.......