You have been more than helpful Stephen. Thanks. Yes I am going to open a PTC case just to find out if it is something I am doing or my assembly or my models. I was really stoked on the concept of envelopes and simplified reps. Loading times for our 2.5k PCB components can be a pain. Have a good day. If I find some more about this I will answer back.
Hi Stephen, Just to follow up on this. It turns out to be my assembly I was using. Not sure the reasons why just yet. I tried and created a new top level assembly it it worked well. Thanks again.