Stats

  • Replies 4
  • Subscribers 143
  • Views 1882
  • Members are here 0

I have a question about family group

TH20240912844

I exported a gds, then streamin that gds into another lib,
I found that the group and family group disappeared, I manually created the family group, but I was told that I could not create it.
I checked that the manually created group had the same contents and relative positions and properties. Why the warning?

The warning information is as follows：

*WARNING* (LX-2417): The specified command cannot be run because the layout cellView has no connectivity reference.

Use the 'Update Connectivity Reference' command to specify a valid schematic design, then run the command again.

*WARNING* (LX-2416): Cannot synchronize the specified groups because they are either not compatible with each other or they are not compatible with the clone family.

To Create a new Family or Add to Family, you can delete the specified groups and use Synchronous Copy.

  • Stream format (aka GDS) is a format that really focuses on the physical information only, and loses connectivity, groups and other higher-level data such as that about synchronous clones. Why not just copy the library and keep the OpenAccess database rather than going via a lossy format iike Stream (GDS)?

    Andrew

  • in reply to Andrew Beckett

    Hi Andrew

    For some special reasons, only through GDS.

    But why can't I create a Family Group manually ? Both groups contain the same things.

  • in reply to TH20240912844

    Not sure why you would make life so difficult, but perhaps you could explain what the precise steps you did were. I just tried editing a layout without connectivity information, and I did the following steps:

    1. Selected the shapes that I wanted to be in a synchronous clone (the first set of shapes), and did Create→Group
    2. Selected the second set of shapes (identical to the first, but elsewhere) and did Create→Group
    3. Use Connectivity→Update→Clone Families
    4. Press the "Create/Add to Family" button
    5. Select the names of the two groups I just created with one of them being the Synchronisation reference, and pressed "Create Family"

    This worked fine for me.

    Andrew

  • in reply to Andrew Beckett

    Hi, Andrew

    Yes, there was nothing wrong with your operation.

    But my procedure is not like this, here is my procedure:

        1. Select a section in a layout that contains: some via, one or two Techlibcells, and some Shapes

        2. copy the selected part to another empty layout

        3. copy it into three copies

        4. Create a group for each copy

        5. Create these three pieces as faimly group

        6. save layout and export it as gds

        7. Import gds into another lib

        8. Open layout and create three copies as group

        9. Create a family group

    You will get the above warning and will not be able to create a family group

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.