Most times I click "start routing" and then click inside the pipe and nothing happens; except the button changes to "Start Routing" again, which indicates something went wrong.. and I don't understand what went wrong.
No matter how many times I try it, it just won't continue on an existing pipe. It works to create a new pipe if I click somewhere else, though.
The only workaround I can do is to insert a Transition with same diameter in both ends; then the MEP Routing will work.
I'm going nuts, cause I just don't understand why;) Is there some way to see why it's failing?