I just use F8 or Tools > Update PCB from Schematic. I think there once was an icon but it’s been deprecated. Or maybe I was thinking of the Generate Netlist icon in 5.1. It’s not something that I am concerned about forgetting, unlike my name and home address.
Tools > Update PCB from Schematic was “greyed out”.
But, the message I got after hitting F8 revealed the problem. Something like I was running in stand-alone mode and had to open a project to get the update from schematic function.
Here’s what I think happened…
Every time I added a new footprint to my new footprints folder, I had to close and re-open the schematic for the new footprint to show up in the footprint assignment tool–at least that’s the only way I could figure out how to do it.
his somehow got the schematic open in “stand-alone” mode. Not sure how or why that happened.
Anyway, when I closed the project, reopened it, started the schematic editor, and launched pcbNew from the editor, all worked as usual.
The DRC errors I referenced in the original post were actual warnings like
"The current configuration does not include the library “foo”.
Those warnings were eliminated with the footprint assignment changes I made.