[SR-Users] Kamailio 4.1.(5-3) Dialog Module can't create hash if 2 same Invite comes.

[Yasin Caner]

Hello
i realize that if two same Invite comes to kamailio sequentially for a 
call, dialog module cannot create hash data and dont'give any error 
about it.
After get ACK or BYE for this call , it gives warning like 'unable to 
find dialog for ACK with route param 'f3f1.0524' [7999:16976]' .
So i cannot get any data call is hook up from dialog event_route.
For prepaid account system , dialog module is weak or i made some 
mistakes. is there any better solution for accounting for high volume 
calls.
I just need that call is hook up and closed or failed. which module is 
best option for it? (IMS ,SEAS, RADIUS)
Thanks