How can I create mates when I download an assembly ?

I download an assembly with parts but there is no mate relations. Shouldn't the drawer add this? How can I solve this? thanks.

2 Answers

If you downloaded solidworks assembly, either the creator might not have assigned the mates or he didn't know that something called "mates" exist in solidworks. :P
if you downloaded step/iges files you are not going to have any mates when you open it in solidworks. In any case you need to assign mates manually.

what format was the assembly, let me have link to assembly and I will take a look