I have SW2016. I have two parts in an assembly. I've created a new third part under the assy for a join to create one part. However, in 2016 - I pull down "Insert" and there is no features option. I used the customization to grab the join command onto my tool bar. But when I have the new part selected for a join, the command is greyed out. The procedure under help does not seem to work.
Thanks in advance,