When running “Update PCB from Schematics” that message shows up, as 1 “warning”, and 0 “errors”.
Then when running the ERC in the PCB editor no messages or warnings about it. Any idea how to trace that schematics message?
you have to run the DRC in the PCB editor to catch it
Thanks I did, but nothing about a via issue there…
Why don’t you show what the message actually says?
The messages in the update dialog are partly independent from both ERC (schematic) and DRC (PCB).
Edit: ah, sorry you wrote it in the topic subject.
This was a bit strange. As mentioned I got that message when updating the PCB from the schematics, though when running DRC in the PCB nothing was mentioned about any Via issues. So I jumped back to the Schematics and also tested to “Update Schematic from PCB”, and then run the “Update PCB From Schematics” again – with no change: the message was still there in the Schematic ERC. So, I went to the PCB editor again and manually deleted all vias. Then back to the Schematics again to run “Update Schematic from PCB” followed by “Update PCB From Schematics” once again and not the message was gone. After this I had to manually add the deleted PCB Vias again and after this run the DRC’s again and now no more messages. Hm.
… BUT when adding new vias again, for 2 x GND copper planes, the message is back again 
Now it’s time to remove them again, one after one…
Yes that one is normally reported, but in this case it didn’t. That’s why I really had to search for that “problem via” which the schematic update told me about but the PCB editor ERC was quiet about.
I tried to reproduce the issue from the backup files, but they all work as they should, reporting in both the schematics and the PCB DRC, so I must have done something strange when this happened earlier today. Which means this issue does not exist.