ulp to create dsn file for external autorouter

[Anonymous]

I am looking for a ulp that creates a dsn file for use with electro autorouter. 

The ulp they provide works with the latest Eagle demo but not my old Eagle 4.0

[hanakp_BUT]

Odd, I thought that all autorouters were pretty much dead technology. Or at least I can't imagine how they could be useful on contemporary mixed-signal and/or high-speed digital boards, whose routing is critical. In the past, I went to a few Orcad and Altium courses - and when I asked around, nobody ever used autorouters for any meaningful work.

[jorge_garcia]

Hello @Anonymous,

I hope you're doing well. Wow, V4.0 that was at least 15 years ago(if not more). You could try these ULPs that are up on our website.
http://eagle.autodesk.com/eagle/ulp?utf8=%E2%9C%93&q%5Btitle_or_author_or_description_cont%5D=dsn&button=

However, at this point I do sincerely feel you would be better served by an update. If you don't do PCB design every day, that's cool, just get a monthly subscription whenever you need to work on a PCB. The cost is very reasonable.

To @hanakp_BUT point, I think the biggest problem Autorouters have going against them are people's expections for them. Even the best constraint based Autorouters can't take every design consideration into effect. If Autorouters could do as good a job as a pro designer, we would all be out of jobs. An autorouter is a tool and part of leveraging it appropriately is understanding it's limitations and what it's good at. For example, EAGLE's autorouter is very useful for dropping pads straight to power planes. That's several hours of tedious boring work that can be easily avoided. Additionally, if you particular circuit has critical nets route those manually first and then let the autorouter go to town on the stuff that isn't critical. In those situations were it is used judiciously it can legitimately save you work, but if you are going to let it run free then yeah the results will be suboptimal.

Best Regards,