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Heirarchy to Flat conversion

Nampoothiri

 

Dear Experts,

I had a Heirarchy based Orcad schematics which was ported to allegro 15.7 and routed some signals too. Later we have updated the schematics and removed the hierarchy and changed to a flat design. While trying to port the netlist to the existing half routed board file, its giving an error #102. Not much explanations on the error.(#102) Could you please help us to solve the issue ? If am porting it to a fresh PCB it works without any problem. Is this because of the change of the schematics from a hierarchy to a flat one ? What could be a possible solution, other than redoing all the schematics modification in the hierarchy based dsn file ? please send me a reply ASAP.

Best Regards,

Sreekanth N Nampoothiri +91 9495151611

  • Romme

    One of the ressons could the need of netnames from sheet to sheet.

    If heirarchy are used, one can change name from subsheet to subsheet when having in mind that topsheet controlls naming. But in a flat design no changes in names should be done through the design (i don't say it is not permitted, but sure not good).

    Some of our customers have changed names 5 - 6 times through the heirarchy and if You flatten that without tripple checking eg. A12 is no longer A12.

    A solution could be to view the old schematic and change all renaming to only one name before flattening the schematic.

     

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