Known Problems and Solutions in Virtuoso Hierarchy Editor

This document describes the known issues with Virtuoso^® Hierarchy Editor and suggests the workarounds for these issues. Each issue is identified by a Cadence Change Request (CCR) number.

Related Topics

Virtuoso Hierarchy Editor Overview

Virtuoso Hierarchy Editor What’s New

Cadence Change Requests

CCR 1171652: How do we keep case to avoid a red unbound instance in HED when ncvhdl is run?

Description: When you keep the case while using ncvhdl, the Hierarchy Editor (HED) may show red unbound instances whenever it tries to update the ncvhdl information that is imported into design libraries.

Solution: The workaround is to add the following syntax to the hdl.var file:

DEFINE NCVHDLOPTS -keepcase4use5x

Now, whenever Hierarchy Editor runs ncvhdl, the option to keep the case can be used.

CCR 2551940: Probe Assistant show different results depends the hierarchy

Description: When you define the constant $default in the view list it does not include the Top cell view which prevents probe tracing to the lower levels.

Solution: Specify the view name of the Top cell when defining $default in the view list to generate a complete view list including the view of the Top cell.

General Issues

Problem: Undo does not work with the Reference Verilog command

Description: When you reference a Verilog file for a cell, instance, or occurrence, you cannot undo it with the Edit – Undo command.

Solution: Instead of using the Edit – Undo command, right-click the cell, instance, or occurrence, and use the Set Cell / Instance / Occurrence View command to set the view to <none>. Alternatively, you need to click the Undo option twice.