I normally don't autoroute anything, but I'd like to try it on a board I'm working on. Problem is this board is 8 layers and my seat is limited to 6 layers. I'm thinking I can remove the layers where I have the power and gnd planes from the stack up and disable those nets in CM. Then add the layers back in after the routing has been done.
If this will work, how do I "lock" any existing traces I have routed to prevent the autorouter from moving them?
I agree 110% with Scott. I used Specctra to manual route almost all the boards I did when I was using Mentor Boardstation. There are still some things that it can do that even Allegro still can't do. For example: one thing EE's liked is that you can go into Shadow mode and bring up the netlist and cycle through each net in the design and auto fit each selection. Just use the down arrow key in the list and you can easily go through a 500-1000 net design in a day. I am sure other old CCT users can site more. Still a great stand alone tool.