*User-Agent: eXosip/3.1.0^M
Content-Length:  


my question is:

Is it possible to send the call to z.z.z.z , receive the SIP 302 , 
process the data in Contact field  and redirect to the new destination 
contained in *Contact: <sip:2145551234@64.112.188.84>;npdi^M
*without closing the session.
i red something about   <action application="set" 
data="continue_on_fail=true"/>  but i'm not sure  how to use it.

Any ideas on this matter  will be highly appreciated.
Best Regards
Chav