Try opening up the part you just edited and roll the features back with the roll back bar in the feature manager a few times then go back to your assembly.
Plus, while you are in that part do a ctrl Q.
See if this helps.
I seem to remember getting that error message if I had pulled the rollback bar up in my part that I was editing and forgot to pull it back down. Could that be the problem?
Andrew Kronquist wrote:
I was editing a part, ...
I can't find any components in rollback, .... My only choice now that I can think of is unplug the computer.
Based on these threads https://forum.solidworks.com/thread/79053?tstart=0
I assume you do not have enough experience to understand a "rolled back state".
Open the part you were editing and post screen shot of the feature browser for that part.
You would never have to "unplug" a computer to end SolidWorks.
Ctrl Alt Delete and select Start Task Manager, then in the Applications tab right click on the SolidWorks and select End Task.
Here is an even quicker shortcut: Ctrl Shift Escape takes you directly to the Task Manager.