2 Replies Latest reply on May 6, 2010 9:37 PM by abin.cv

    via limitation

    abin.cv

      iam using mentor expedition pcb 2000.5. i have some problem with via stack up , iam using over 20000 vias in my board

      when save and reopen of the project gives me a error stating the  via  padstack 0-0 is missing. and file closes

       

      1.is there any via limitation in this version?

       

      thank in advance

       

      abin

        • 1. Re: via limitation
          matthias.cosaert

          Sounds like a corrupt layout database to me.

           

          I have had a simular problem with a 4 Layer board that wouldn't open a board because a via padstack 1-14 that was missing...

          I copied the \work\Backupdatabase\ to my layout folder and could reopen it but when I saved and reopend I got the error back.

           

          When I viewed the via definition in setup parameters it effectivly said layer 1-14 instead of Trough Via.

           

          I exported the layout database to ASCII and changed the in the ..VIA definitions the text 'LYR_1 LYR_14' to 'LYR_1 LYR_4' and reimported it which fixed the problem.

          1 of 1 people found this helpful
          • 2. Re: via limitation
            abin.cv

            thanks for your response,

             

            i have tried taking the backup database and open the layout but i did not find the similar problem u faced

             

            as iam doing a 6 layer board my setup parameter show's 1-6 via stackup only