Question about performance of ICC Zroute

wilson168

I have a question about the performance of ICC Zroute:It seems doesn't have a good result for ICC Zroute doing tsmc 0.25um process.
User must  use classical route to do the final routing , otherwise the chip can not be clean.
Does anyone have same experience on this situation? and  then give me input to get better solution.

My tcl commands as following:
route_zrt_group -all_clock_nets \
  -max_detail_route_iterations  50

route_zrt_auto \
  -max_detail_route_iterations  100

route_zrt_detail -incremental true -max_number_iterations 200

route_search_repair \
  -rerun_drc  \
  -loop 300 \
  -trim_antenna_of_user_wires