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AR# 4694

A1.5/F1.5 Map - Map segmentation faults in x1_5.19. Ran okay in x1_4.12p.

Description

Packing logic in CLBs...
Running cover...
Undirected packing...
Running physical design DRC...
Segmentation Fault

Reproduces in x1_5.21 and 23.

解决方案

This map crash occurs when map processes empty Time Groups. A common source
of empty time groups occurs when users define a Time Group such as:

TIMEGRP "BUSFFS"=FFS("BUS<*>");

under the mistaken belief that the wildcard string "BUS<*>" matches FF instances
names when in fact it is intended to match FF output net names. This can lead to
empty time groups which in turn leads to the map crash in x1_5.21 (M1.5 Service
Pack). Time Groups can also be empty if the FFS involved are all trimmed by
the mapper.

The map crashed is fixed in version 1.5i. Map will now run successfully and also
warn of the existence of empty Time Groups.
AR# 4694
创建日期 09/25/1998
Last Updated 04/19/2000
状态 Archive
Type 综合文章