Multisim and Ultiboard

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Internal Program Error 1264

Trying to run the autorouter in Ultiboard and it has been working. Rearranged some parts to make the routing easier and now am getting this when I try to run the autorouter: 

Autorouter[IC_console] 2010-11-01 15:51:05

Routing terminated due to an error

Internal Program Error 1264

 

 

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Figured it out. I went through the entire design and one part at a time selected "autoroute selected parts" until I found one that caused the same error. It was a USB connector and D+ and D- were defined as a differential pair 'group'. But in the netlist editor I removed them from the group because the router couldn't route them as a pair (don't know why, was planning on figuring that out after I got the board to route with no restrictions). As soon as I deleted the differential pair group, the error went away. 

 

Any chance the error messages could be made to be a little more informative? Radomly changing things to see if it affects it is a very time consuming process. 

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