connect two metal nets

Deeksha D said:

I am trying to connect two metal nets (objType~>path).

Did you have a question?

Andrew

Hi Andrew I Posted my question below for your understanding

Hi Andrew, I'm having an error when using this code. The first time I used it was done correctly, but after that time, I'm getting the error even rebooting cadence.
  
Is this something I need to check with support? or do you know why this happens? 


Best regards,
R.Gómez

I'm using the viaGenerateViasAtPoint() SKILL function to place the vias. It turns out that if you are not using VLS EAD (in IC6.1.8) or VLS EXL (in ICADVM20.1), then it checks out GXL tokens instead. Potentially it could use lxComputeViaParams instead to compute the parameters (this requires VLS XL licensing) and then create the via using dbCreateVia. That's not as convenient as using the via.* functions though as it's more work.

Andrew

Thanks a lot Andrew

Hi Andrew,

I am interested in the code which you posted.

The code is giving me the following error:

I am using the Virtuoso Version ICADVM20.1.

Regards,
Vallabha

Vallabha,

First of all, what does:

cstGetDefaultConstraintGroupName(geGetEditCellView() "Via")

return with the layout window active? 

Secondly, if you do this:

tf=techGetTechFile(geGetEditCellView())
cg=cstFindConstraintGroupIn(tf "theNameFromFirstFunc")

where theNameFromFirstFunc is what the cstGetDefaultConstraintGroupName returned, what happens? 

My guess is that either the default constraint group name mis-specified in the environment, or that constraint group does not exist in the tech file.

Andrew

Hi Andrew

Thanks for the quick reply.

cstGetDefaultConstraintGroupName(geGetEditCellView() "Via") 

returning a constraint group that is defined in the reference tech lib.

tf=techGetTechFile(geGetEditCellView())
cg=cstFindConstraintGroupIn(tf "theNameFromFirstFunc")

returning nil, I think it's because the constraints group is coming from the reference tech lib.

The code is working fine after I changed the Via Constraints Group to "foundry".

Regards,
Vallabha

Vallabha,

I've updated the code above (I edited the original post to replace with a newer version) which should handle the constraint group either being in a reference technology library, or even in the design. Apologies for this - a silly oversight on my part.

Hopefully you can try that and it should (I hope) work for you.

Regards,

Andrew

Thanks Andrew for the updated code.

The updated code is giving me the following error.

Regards,
Vallabha

Vallabha,

Please ensure that the code is in a file with a ".ils" suffix (not ".il") before loading it. This ensures it will be read using SKILL++ semantics (that's what the SCHEME message is about). That should fix the problem.

Regards,

Andrew

Andrew,

The code is working perfectly.
Thank you very much!

Regards,
Vallabha

Andrew,

The code is working perfectly.
Thank you very much!

Regards,
Vallabha