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<DIV><SPAN class=585435408-04072006><FONT face=&#23435;&#20307; color=#0000ff size=2>I have 
found the reason with "RTP over TCP". In SingleStep(), WSAGetLastError() 
returned 10038.</FONT></SPAN></DIV>
<DIV><SPAN class=585435408-04072006><FONT face=&#23435;&#20307; color=#0000ff size=2>So 
exit(0) is called.</FONT></SPAN></DIV>
<DIV><SPAN class=585435408-04072006><FONT face=&#23435;&#20307; color=#0000ff 
size=2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=585435408-04072006><FONT face=&#23435;&#20307; color=#0000ff size=2>But I 
dont know how to deal with it.</FONT></SPAN></DIV>
<DIV><SPAN class=585435408-04072006><FONT face=&#23435;&#20307; color=#0000ff 
size=2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=585435408-04072006><FONT face=&#23435;&#20307; color=#0000ff size=2>Any 
advices?</FONT></SPAN></DIV>
<DIV><FONT face=&#23435;&#20307; color=#0000ff size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=&#23435;&#20307; color=#0000ff size=2></FONT>&nbsp;</DIV>
<DIV align=left><FONT size=2></FONT>&nbsp;</DIV>
<DIV align=left><FONT size=2>Zhixue Zhang</FONT></DIV>
<DIV align=left><SPAN class=395344607-04072006><FONT face=&#23435;&#20307; color=#0000ff 
size=2></FONT></SPAN>&nbsp;</DIV></BODY></HTML>