Dear All : 

I designed a master-worker framework with boost MPI, in which the master can schedule

multiple tasks (numTaskPerWorkerNode) to each worker and then collects results from workers.

if the numTaskPerWorkerNode = 1, it works well. 

But, if numTaskPerWorkerNode > 1, the master cannot get the results from workers. 

But, the workers can get the tasks from master. 

why ?

I have used different taskTag to distinguish the tasks, but still does not work.

Any help is appreciated. 

Thanks, 

Jack 

July 4  2010