My part already open. Please help to resolve the problem...
I am also having this issue and cannot seem to find a fix. Not sure if it was related but I was forced to remap the routing file locations because Solidworks lost them.
Stupid question, but did you reboot? I had this come up on a test machine and thought it strange as well.
It did end up working whenever I restarted my computer. I restart my computer, open the part I want to run the routing component wizard on and it was able to get past the "open part first" error. All the other steps worked except for when I needed to save the component to library. It has a problem saving the part to the "\routing\electrical\components.xml" file. Unfortunately, for any additional routing I want to do the Route Library Manager either crashes, does not recognize a part is open or loses the route file path and I need to restart my computer again for additional parts.
What Version SW are you running?
I am running SW 2016 Premium SP2.0 X64. Due to some other issue I did have to reinstall it about two months ago so not sure if that messed something up. It does ask me sometimes to remap my routing files but even if I do that it still does not work. This is the first time I have used the routing tool.
Retrieving data ...