What settings do you have for your link symbols? DRC 823 checks for links with different names to the nets attached, not Port symbols. Port symbols, those that traverse the hierarchy can have different names to the nets they attach to.
Checking with 7.9.5 update 15 DRC checks through hierarchy for both Board and Block and all hierarchy underneath for check DRC-823. What does your hierarchy look like?
Thank you, Robert. I just observed this, and posted it here to hear if other users also have or had this error.
As long as I am the only one seeing this, it is probably something on my side and I do not expect a response from Mentor in that matter.
But, again, how is selecting for DRC defined? The sheet that is open in the schematic editor window defines the selection?