[PCB_FORUM] Re: Component disappearing from board while importing logic

Hi Austin

It should place the revised symbol even if it creates a drc.
The only things we've run into that will cause it not to place are:

No device file, but then the netlist won't read in either.
No Symbol in the board or library.
A padstack used by the new symbol that is not in the board or available
in the library.

Austin Franklin wrote:

>  Hi Matt,I had tried those options.  It may be, in my case, that if
> the footprint was changed in physical size, say, from an 0402 to an
> 0603 and the new footprint would create a DRC error and it won't place
> it.  If DRC is why, then I could turn DRC off and see.Regards,Austin
>
>      -----Original Message-----
>      From: Matt Dunn [mailto:mdunn@xxxxxxxxxxxxxx]
>      Sent: Monday, March 21, 2005 9:40 AM
>      To: icu-pcb-forum@xxxxxxxxxxxxx
>      Subject: [PCB_FORUM] Re: Component disappearing from board
>      while importing logic
>
>      Under inport logic, ther is an option block for what to do
>      with changed components.
>      Pick always and changed components will be placed where they
>      were, unless the symbol or a padstack is not available.
>
>
>
>      Austin Franklin wrote:
>
>     > Hi Trilok,When you say you changed JEDAC, do you mean the
>     > physical symbol (PCB footprint)?  If so, then it will do
>     > just as you say in my experience.  It only keeps placement
>     > of components that are the same physical symbol (and
>     > REFDES).  Unless there is an option somewhere that
>     > prevents it from doing that, it's the way it works.The way
>     > to avoid this, possibly, is to change the footprint
>     > manually by using "Logic/Part Logic" and changing the
>     > "Allegro Packages" for the parts you want to
>     > change.Regards,Austin
>     >
>     >      -----Original Message-----
>     >      From: Budathoki, Trilok (GE Consumer &
>     >      Industrial) [mailto:trilok.budathoki@xxxxxx]
>     >      Sent: Monday, March 21, 2005 1:47 AM
>     >      To: icu-pcb-forum@xxxxxxxxxxxxx
>     >      Subject: [PCB_FORUM] Component disappearing from
>     >      board while importing logic
>     >      Hi Everyone,Here's a  problem while importing
>     >      Logic in allegro. Board is completely routed & I
>     >      am re-importing logic with minor changes, Some
>     >      of the components are disappearing from board &
>     >      appears on the Menu --> Place -->Manual -->
>     >      Components by ref des.We have changed JEDAC only
>     >      for changed components. In Import logic, I have
>     >      tried all possible options. This problem is both
>     >      in Allegro Designer & Expert. We use  version
>     >      15.2 Has anyone faced similar problem & got any
>     >      remedy.Thanks in advance.Trilok Budathoki
>     >      GE - India Business Center
>     >      (: 91-40-27881731(Direct)
>     >      * : trilok.budathoki@xxxxxx
>     >
>     >
>      --
>      Matt Dunn
>      Director of Design Operations
>      Applied CAD Knowledge, Inc.
>      matt@xxxxxxxxxxxxxx  978-649-9800
>
>
--
Matt Dunn
Director of Design Operations
Applied CAD Knowledge, Inc.
matt@xxxxxxxxxxxxxx  978-649-9800

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