WARNING error on /var/adm/messges - NS failure pkt state=dreason=9

The following message was logged on one of my V490s ( uname -a  SunOS robin 5.10 Generic_142900-11 sun4u sparc SUNW,Sun-Fire-V490)

Jun 14 15:38:14 robin fctl: [ID 517869 kern.warning] WARNING: fp(0)::20500 NS failure pkt state=dreason=9, expln=1, NSCMD=0100, NSRSP=8001


Should I treat this as a serious error?

Thanks for any insight,
Glen

Support found an error(?) in FC switch zoning using the following commands

luxadm -e port
/devices/pci@9,600000/SUNW,qlc@2/fp@0,0:devctl                     CONNECTED
/devices/pci@8,600000/SUNW,qlc@1/fp@0,0:devctl                     CONNECTED
/devices/pci@8,600000/SUNW,qlc@2/fp@0,0:devctl                     NOT CONNECTED

fcinfo hba-port
HBA Port WWN: 23000003bab05195
        OS Device Name: /dev/cfg/c1