Hey all, does anyone know what the warning “Drilled holes co-located” means? I have a few of these warnings that reference vias that result from differential pairs. I had to use them to reverse the polarity of the USB data lines because the orientation on the USB/UART chip I was using was the opposite of both the port and the inputs on the MCU. The drills are in fact co-located, but I don’t really understand why that would be a warning, since it’s literally a feature of the differential pair placement.

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I think that Pcb manufacturers don’t like drill holes too close together or in the same place as a slight offset may break the drill bit.

“Drilled holes co-located” means there are multiple holes excactly at the same position. Drill holes too close together get an error saying exactly that.

Ah! Thanks, this made me realize that there were in fact extra drill holes present that I couldn’t see because they were in exactly the same place. No idea how they got there, might be a bug with the routing of differential pairs through vias.