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AR# 23467

8.2i ISE - Project Navigator, Toggle Paths option causes the design top-level icon to disappear

Description

Keywords: hierarchy, top, levels, view, sources, remote, set as top, top-level

In a hierarchical design, the top-level icon indicates which source is currently considered the top level of the design for synthesis, implementation, and simulation. In some cases, the top-level icon disappears when I right-click on the top-level file and select Toggle Paths.

Solution

The issue is visual only; the synthesis, implementation, and simulation processes are still associated to the top level of the hierarchical design. To be assured that the proper file is selected as the top-level, right click on the desired source in the hierarchy and select the "Set as Top Module" option.

Additionally, any operation that causes the hierarchy to be re-analyzed, such as adding or removing a source, should also restore the top-level icon.
AR# 23467
Date Created 09/04/2007
Last Updated 04/16/2009
Status Archive
Type General Article