I'm working with allegro 16.6 and am exporting a an already routed PCB design as IDF to solidworks folks.
It turns out one of the symbols in the pcb design was missing height information. I opened the symbol in allegro and added the height info.
Then I went into the pcb design place->update symbol and selected the proper symbol. The symbol updates , I exported the IDF, and now the solidworks folks are happy.
One problem however: the symbol's pins in allegro all have ratsnest on them now. I can go and reroute the clines next to the pins and this seems to fix the issue, however, it would take a long time to do all of the pins and could potentially be error prone.
I'd like to point out that before the symbol update there were no ratsnest / unconnected pins on in the design and specifically on this particular symbol.
Is there anyway to connect the pins / fix the ratsnests?
Thanks in advance.
It sounds like your footprint units are different than your board units which results in a rounding error.
You can try running Tools => Derive Connectivity and select the top option, Convert Lines to Connect Lines. I believe that should work for at least most of the connections.
In reply to chads108:
In reply to cadSmith:
I think as long as you stay in the same units, e.g. mils and mils, you are fine. If you are doing mils and millimeters, then you can get rounding errors. We do everything in millimeters using same decimal places and have never had a problem with symbol refresh. I understand not all companies have that luxury though.
I'm pretty sure that IPC uses MM as a default now so if you build your footprints to IPC 7351 then you should be using MM as the unit. This is also incorporated into the footpint name.