Printing group

[spanishcop]

So I have 3 STL files that I have imported into S3D. I then selected them and grouped them together as group 1. When I choose to send to print, it is only showing the first STL of the group instead of all 3 STL files that I have grouped together. So how do I get all 3 STL files to print as ONE PIECE. I have them connected with each other and you would think the slicer would slice all 3 objects just the way I have them setup.

Is this possible or is this not an option?

Tinkercad won't let me do it to combine as one STL because it says the file is too complicated for it to do it. Is there any free software out there that will allow me to combine these 3 files as one STL to print on 3D printer?

Thanks
Mike

[S3D-Chris]

Make sure to double check that all your models are selected by using the Select Models option in the bottom left of your process settings.