Red5 + sip after logout from a client: java.lang.NullPointerException

Hi,

in my configuration (Openfire 3.5.2 + latest red5.war) my logs ==> 127.0.0.1.5071_events.log <== and ==> 127.0.0.1.5070_events.log <== are full of:

Exception: java.lang.NullPointerException

at org.zoolu.sip.provider.SipProvider.sendMessage(SipProvider.java:682)

at org.zoolu.sip.provider.SipProvider.sendMessage(SipProvider.java:663)

at local.net.KeepAliveSip.sendToken(KeepAliveSip.java:81)

at local.net.KeepAliveUdp.run(KeepAliveUdp.java:156)

at local.net.KeepAliveSip.run(KeepAliveSip.java:88)

Thanks,

Duccio

Still looking for the cause of this exception.