I used congOpt to remove congestions in my design.like "congOpt -nrIterIncongOpt 80",But the tool tell me "Improving Congestion Failed" at the end.There‘s no error from tool for remind. I used version of 8.1.
How to solve this?
And, can someone tell me some skill to improving congestion？
Starting refinePlace ...
Statistics of distance of Instance movement in detailed placement:
maximum (X+Y) = 87.36 um
inst (xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/u96) with max move: (134.96, 1123.36) -> (133.84, 1209.6)
mean (X+Y) = 4.37 um
Total instances moved : 3710
*** cpu=0:00:00.3 mem=350.9M mem(used)=0.0M***
*** End of Improving Congestion (cpu = 0:00:04.2) ***
**WARN: (SOCSP-9023): Improvement for Congestion failed.