Answers Database


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


Record #4694

Product Family: Software

Product Line: FPGA Implementation

Product Part: map

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


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

Reproduces in x1_5.21 and 23.


Solution 1:

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.




End of Record #4694 - Last Modified: 10/21/99 14:47

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