Hello,
I'm trying to generate an extracted view from a layout with QRC and, after selecting the LVS run to be extracted, I'm promped with the following message:
"You are about to enter names from conflicting name spaces
Do you want to continue?"
Either if I say YES or NO, I can see that there are some imprecisions in the extraction. Specifically, I have a poly1 plane in my layout, which typically is extracted with a huge capacitance toward the upper metals. Apparently this capacitance disappeared completely, without any additional warning from the CIW. The capacitance from the upper metal layers is simply reported to substrate (gnd), without considering the poly layer. This imprecision in the extraction is very critical as the poly-capacitance has a key role in my design - that's why I noticed the difference immediately - but I can't tell if there are any other problems with other layers.
Can anybody help me understanding what's going on, or can tell me what's the meaning of the warning message that appears when I launch the QRC?
Thank you,
Filippo
p.s.: I'm using Cadence IC6.1.5.500.132 and running the extraction with ASSURA 4.1_USR2_HF20 and Cadence Extraction QRC version 11.1.2-p106.