Known Problems and Solutions in Virtuoso Abstract Generator
This document describes the known issues with Virtuoso Abstract Generator and suggests the workarounds for these issues. Each issue is identified by a Cadence Change Request (CCR) number.
Related Topics
CCR 2824651: "ExtractPurposeList" option is not supported for Power Net extraction in IC23.1
Description: The ExtractPurposeList SKILL option introduced in IC23.1 is currently supported only for signal net extraction, and not for power net extraction. This option can be used to improve the performance of signal net extraction in dense designs having a large shape count.
Solution: There is no solution or workaround available.
CCR 2429070: Unsupported options for Power net extraction in IC23.1
Description: The following options are currently not supported for power net extraction:
Solution: There is no solution or workaround available.
CCR 2765133: Trim shapes are not honored for a simple GSPEC (eg M1 M1) for Power net extraction in IC23.1
Description: This is a rare design scenario. To account for performance optimization during power net extraction, the trim engine is only triggered when non-simple geometric specifications (that include some sort of geometrical manipulation operations on the metal shapes using logical operators) are defined. Trim shapes on metal layers are automatically derived from the technology specifications. There is no change in the approach.
Workaround: As a workaround, you can specify the geometrical specifications with the required metal purposes for the impact of the trim shapes on the metal layers to be accounted for during power extraction.
CCR 2733481: Abstract Generator: Support for groupArrays
Description: Currently Abstract Generator does not process group array objects.
Solution: There is no solution or workaround available.
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