encounter: routeDesign有时出现警告Some nets are not global routed

zjz123

求教各位高人，encounter在做routeDesign -viaOpt时，有时会出现WARNING：
#Using multithreading with 4 threads.
#WARNING (NRDR-13) Some nets are not global routed. Detail routing cannot be run.
#WARNING (NRDR-14) Net paddr_i2c_2 is not global routed.
#WARNING (NRDR-16) 1 nets out of 54201 nets are not global routed. Please run globalRoute or globalDetailRoute on these nets before detailRoute.
#WARNING (NRIF-19) Failed to complete detailRoute on Mon Oct  8 16:40:57 2018
#
请问怎样才能解决这个问题，还是可以忽略？(globalDetailRoute前一步已经做过了）

命令如下：
setNanoRouteMode -droutePostRouteSwapVia multiCut
setNanoRouteMode -drouteUseMultiCutViaEffort medium
setNanoRouteMode -routeReserveSpaceForMultiCut true
routeDesign -viaOpt

zjz123

没有人碰到过吗？