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A VERY Fundamental Problem

ctocci

Folks,

I have learned a lot on how to use Allegro, but found that I cannot import a very simple four two lead component OrCAD schematic into Allegro!!  This is fundamental, and I have checked the Library paths in Preferences and indeed, I have pointed at the DRA footprints like re0603 and r0805 and sip6 and they are there in the Symbols library, but when I attempt to import into a new Allegro layout, all of the components are present, but when I check one and try to place it in the open layout, it simply says " Symbol C0603 not found for component C1".  Yet you go to symbols under the D:\ENGINEERING\Cadence\SPB_16.2\share\pcb\pcb_lib\symbols\ where I have the full set of DRA, PSM and TXT files for these very simple components and cannot get them to come into the layout.

Old Mouldy...what the hell am I missing here?  Do you need to place a board outline first (weird if true) or some other step I am not doing correctly.  BTW, it is version 16.2 and netlisting from the OrCAD schematic executed without any issues.

Chris

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  • ctocci

    Hi,

    I discovered that the DRA, PSM and PAD files should probably be in the same directory.  This directory could be something completely different from what Cadence defaults too, but I did get it to work just fine by using the old "standard" DRA, PSM and PAD files that came with my installation to do my little "4 component circuit" to prove my point.  So yes, I have it working, but as a very long term user of OrCAD Layout Plus, boy, Allegro is much more involved to the simplest things.  This is one of the reasons I am staying at 16.2 for now until I understand Allegro much better and not feel so intimidated by it.

    One more question, as you can have several entries or paths for your libraries in the Preferences, does it matter that the one you want is the first entry or does that even matter provided it can find the DRA, PSM and PADS files?

    Chris

Reply
  • ctocci

    Hi,

    I discovered that the DRA, PSM and PAD files should probably be in the same directory.  This directory could be something completely different from what Cadence defaults too, but I did get it to work just fine by using the old "standard" DRA, PSM and PAD files that came with my installation to do my little "4 component circuit" to prove my point.  So yes, I have it working, but as a very long term user of OrCAD Layout Plus, boy, Allegro is much more involved to the simplest things.  This is one of the reasons I am staying at 16.2 for now until I understand Allegro much better and not feel so intimidated by it.

    One more question, as you can have several entries or paths for your libraries in the Preferences, does it matter that the one you want is the first entry or does that even matter provided it can find the DRA, PSM and PADS files?

    Chris

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