Charm++ parallel programming system

[Xuehan Xu <xxhdx1985126 AT gmail.com>]

Dear Sirs:   
        I made some modification to the 
BlueGene network model, I wish some of the NetInterfaces in the network model to communicate with 
each other directly, not through channels or switches. So, in the 
NetInterface class, I insert the statement "POSE_invoke(recvPacket(p),
 NetInterface, DestId, Delay)" to let the NetInterfaces to communicate 
with each other directly when some condition is satisfied. But, it seems
 that every time this POSE_invoke is made,  the recvPacket of the 
NetInterface on the other side will try to call the "buildAck()" 
function which is only called when the multicast is available and lead 
to a segmentation fault. When I delete these POSE_invokes, the problem 
no longer exists, and the buildAck is never called at all. 

       The problem can be duplicated by replacing the POSE_invoke call to switch at Nic.C line 186 with a POSE_invoke call to some NetInterface object in the network model.

        Why is this 
happenning? I'm so confused, please help me. Thanks everyone:-)