[reSIProcate-users] [mSis not valid]

[nadeige Da costa <nadeige2009@xxxxxxxxx>]

Hi all,

I am using resiprocate and trying to modify the behaviour of my UAS in case that it receives a SIP INVITE.

Therefore, I have modified the onOffer function in this way: 
Uas::onOffer(InviteSessionHandle is, const SipMessage& msg, const SdpContents& sdp) {
    Function1(is, ...);
}
The only thing done by the onOffer function is contacting an external function Function1(is, ...).
Moreover, I have added a new function in my UA's class

Uas::Function2(is, ...)
{
      is->provideAnswer(*(this->sdp));
      mSis->accept();
}

So that, when an external application will call the Function2, this one will be able to send an answer 
to the INVITE message sent by a UAC. 

The issue is that:  mSis->accept(); does not work. An exception is thrown and the 200 OK message is not sent.
 The mSis parameter used in the Function2 is declared to be not valid by the isValid() function.

Please could you give a piece of advice to solve my problem ?
Thanks in advance.