Iphone can't register SIP URI.

[koromochu9999]

Hi @s5uishida
I try sip registration with iphone and RAN simulator and kamailio and Open5GS.
Iphone send sip Register message to p-cscf but some error occur as follow:

pcscf | 89(126) ERROR: [core/resolve.c:1715]: sip_hostport2su(): could not resolve hostname: "ims.mnc01.mcc001.3gppnetwork.org"
pcscf | 89(126) ERROR: tm [ut.h:310]: uri2dst2(): failed to resolve "ims.mnc01.mcc001.3gppnetwork.org"
pcscf | 89(126) ERROR: tm [t_fwd.c:1728]: t_forward_nonack(): failure to add branches
pcscf | 89(126) ERROR: tm [tm.c:1679]: _w_t_relay_to(): t_forward_noack failed
pcscf | 89(126) ERROR: sl [sl_funcs.c:392]: sl_reply_error(): stateless error reply used: Unresolvable destination (478/SL)

Could you help me?
Thank you.