icc2 在做place_opt 的时候遇到了上面的Error,有大神知道怎么解决吗?
icc2_shell> place_opt
Setting up Chip Core
Chip Core shape: (0 0) (18956600 18929700)
_mvAwareAbufBlockageGridMarking=true
Number of unique supply nets = 2
Number of unique PDs = 1
hier= mapped to power domain=DEFAULT_POWER_DOMAIN
Number of Power Domains = 1
Number of Voltage Areas = 1
Number of supply Nets = 2
Warning: Cannot find default buffer/inverter for VA DEFAULT_VA with Block Hierarchy . (OPT-043)
Error: Cannot find usable buffers or inverters. (OPT-045)
Information: Running auto PG connection. (NDM-099)
Error: 0
Use error_info for more info. (CMD-013)