Is that on a 100% completed autorouted PCB?

See also: [https://easyeda.com/forum/topic/Auto-Router-suddenly-started-routing-tracks-on-top-of-tracks-4bf64577fcb84566955a328bfe0fb3fc](https://easyeda.com/forum/topic/Auto-Router-suddenly-started-routing-tracks-on-top-of-tracks-4bf64577fcb84566955a328bfe0fb3fc)

@andyfierman Yes it is. that is the strange part, why would the auto-router finish as 100% and show 0 fails while there are DRC errors like this !!! I mean i get it that the auto-router couldn't route all the traces (this is a very complicated circuit!) but it should alert me that it failed instead of finishing with "failed 0" status.. I have already seen that post and saw your comment there and added one as well. But to be fair if you check the Design Manager tab after auto-routing, if there are errors like these they will appear as DRC errors.

What I would suggest is that, if possible for your design, rotate the right and left side pins 180', so the top connections go to top side of the board and bottom goes to bottom. See images below: Now you have the ratsnest going from top to bottom  My suggestion:  Now the top traces go to the top IC's and bottom to bottom making it easier to route both by hand and the autorouter. Also, try not to route GND connections, maybe even VCC, because they will screw with the routing of your signal traces. For the GND connections, just place a Copper area over the board top and bottom layers, for VCC, either let it route it or do it manually. 

@deskpro256 Hello, unfourtonatlly i can't flip the headers, i know the design is very very much nested that's why i understand that the router failed, since then i have changed the design with a much cleaner one that i am routing by hand.. it's more of a bus now as i replaced the mux ICs with tri state buffer. i will share the design when i'm done. (it's a [4x32:1x32] mux for a risc project if anyone is interested).

@deskpro256 Also, skipping ground and vcc is a great advice, thanks.