3 Replies Latest reply on Feb 6, 2018 8:50 PM by venkateshwarlu

Calibre DRC/ERC error with COPY command for edge layers

venkateshwarlu Jan 30, 2018 11:17 PM

Hi,

I am using the COPY command to output all the intermediate derived layers inside a calibre DRC/LVS rule file.

For one of the derived ayer i am getting below error.

line 1605 is t_gate_edges {COPY gate_edges}, the gate_edges is an edge layer. Why COPY command is not outputting edge layer.

I tried "DFM COPY" instead of just "COPY" command and it worked.

If i use DFM COPY instead of COPY is it effect runtime? because I am using this command for around 2500 layers(Means 2500 rule checks)

Thanks,

Venkatesh

1. Re: Calibre DRC/ERC error with COPY command for edge layers

samantha_lizak Jan 31, 2018 2:23 PM (in response to venkateshwarlu)

Hi Venkatesh-

Actually, the compilation error says that the rules are trying to copy error layers, not ege layers. As described in the SVRF, error layers contain clusters of edges; true edge layers contain non-clustered edges. As you noticed, most operations can't work with error layers, though DFM Copy and DFM OR Edge can.
Your choices to get the information out are either use the DFM version of the commands, or change the layer derivations to create edge layers rather than error layers by using [] and () in the operations that create them. See "Derived Error Layers" in the Calibre Verification User's Manual for more on working with them.

Hope that helps-

Sam.
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2. Re: Calibre DRC/ERC error with COPY command for edge layers

chris_balcom Feb 6, 2018 3:50 PM (in response to venkateshwarlu)

Hi Venkatesh,

From a performance standpoint, I expect DFM COPY to be fine for what you're doing.

-chris
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3. Re: Calibre DRC/ERC error with COPY command for edge layers

venkateshwarlu Feb 6, 2018 8:50 PM (in response to chris_balcom)

Thank you! samantha_lizak & chris_balcom for the useful information
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