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OPAL crashes when SIP end point is not listening



Hello,
 
I am using last release of OPAL (2.1.beta2 - 26 January 2006) and trying with simpleopal sample application.
 
Simpleopal crashes when calling to SIP end point which is not running (therefore it is not listening), but IP address is alive (ping is responded). Though, if I call to SIP end point with net interface disabled (ping is not responded), the call fail but simpleopal doesn't crash. This problem also occurs when registering with SIP registrar which is not running but IP address is alive.
 
I think that this problem occurs for all cases OPAL sends a SIP PDU to IP address where is no one listening at the target port.
 
Any solution?
 
I also have found problems by compiling OPAL. I am using Windows XP and Visual C++ 6.0. When compiling I get several link errors because several functions was not defined (all about speex codec). I have must add some files of speex codec to OPAL project (speex.c, speex_preprocessor.c, etc.) in order to compile and link correctly simpleopal. Though, when I compiled previous release (2.1.beta1) some months ago, I compiled OPAL successfully with no errors.
 
Regards,
 
    Ruben Lopez