AR# 10675: 3.1i Virtex MAP - MAP crashes due to conflicting LOC constraints.
3.1i Virtex MAP - MAP crashes due to conflicting LOC constraints.
Keywords: LOC, IOB, PAD, crash
General Description: A case has been seen where MAP crashed during the "Running directed packing..." phase. The problem was due to the fact that multiple registers had been assigned the same LOC attribute, which was an IOB location. This conflict apparently leads to the MAP failure, as the design runs successfully when the conflict is removed.
This problem has already been fixed for the next major release (July, 2001). MAP correctly reports the conflict with a pack error.