If you have atpadssim feature in your license you're good to go.
You need to first start the server on the ADS side from the ADS project manager.
There are many parameterrs to consider:
Version of Expedition?
Verison of ADS?
Did you install the MentorDA pdk in ADS? -must be done first.
It will be hard to resolve this on the forum. Can I ask you to contact customer support? -or contact me off line.
We can publish the solution here when we have you up and running.
I guess I have exactly the same problem. The .pdk is installed in ADS - server started from ADS but I'm also not able to make a connection to localhost.
connecting to [localhost:4001] ... failed
cannot connect to [localhost], needs license atpadsim
have you find a solution to post?