SIP Reloading error

After modifying the sip.conf, I found the error below.

Parsing ‘/etc/asterisk/sip.conf’: Found
Feb 8 16:23:48 WARNING[3834]: chan_sip.c:12455 reload_config: Empty context specified at line 50 for domain ‘xx.xx.xx.xx’
== Parsing ‘/etc/asterisk/sip_notify.conf’: Found

Could you please explain to me what should be done to correct the problem.

Thanks.
John

What do you have on line 50 of sip.cfg? It is probably context= and you should have something like context=default