nanoroute search and repair

Hi,
When I use nanoroue to do fix antenna,it cannot not fix it for several loop.
how to begin new search and repair cycle to fix the antenna?

start delete and reroute for process antenna violation fix ...
#Total wire length = 8948664 um.
#Total half perimeter of net bounding box = 7834222 um.
#Total wire length on LAYER METAL1 = 246604 um.
#Total wire length on LAYER METAL2 = 1425511 um.
#Total wire length on LAYER METAL3 = 1876440 um.
#Total wire length on LAYER METAL4 = 1937179 um.
#Total wire length on LAYER METAL5 = 2116442 um.
#Total wire length on LAYER METAL6 = 1346488 um.
#Total number of vias = 953256
#Total number of vias on LAYER METAL1 to METAL2 = 280094
#Total number of vias on LAYER METAL2 to METAL3 = 320333
#Total number of vias on LAYER METAL3 to METAL4 = 153856
#Total number of vias on LAYER METAL4 to METAL5 = 112529
#Total number of vias on LAYER METAL5 to METAL6 = 86444
#Total number of DRC violations = 0
#Total number of net violated process antenna rule = 188
#Total number of violations on LAYER METAL1 = 0
#Total number of violations on LAYER METAL2 = 0
#Total number of violations on LAYER METAL3 = 0
#Total number of violations on LAYER METAL4 = 0
#Total number of violations on LAYER METAL5 = 0
#Total number of violations on LAYER METAL6 = 0
#
#WARNING (NR)
#MINENCLOSEDAREA is not defined; therefore, loop fixing won't be executed