Hi Kyle, First of all, you have to clean up your code and produce a test case, don't forget to paste the error message, it's useful. This is a great start: //send particlesfor(int i=0;iboost::mpi::status msginfo=world.iprobe(mpi::any_source, world.rank());while (receive_countersource(),world.rank(),particles_received); // blah blah blah receive_counter++; } msginfo=world.iprobe(mpi::any_source,world.rank());} Regards, Júlio. 2012/12/10 Kyle Joseph Berger

Hello,****

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I am using boost mpi and I am having issues getting the message truncation error upon receiving a message. It is not always the same message, but it does always happen and I have been unable to figure out why. Here is the code of interest:****

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//send particles ****

for(int i=0;i

{****

world.isend(i,i,particles_to_be_sent[i]);****

}****

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//receive particles****

int receive_counter=0;****

boost::optionalboost::mpi::status msginfo=world.iprobe(mpi::any_source, world.rank());****

while (receive_counter

{****

if (msginfo)****

{****

world.recv(msginfo->source(),world.rank(),particles_received);****

for (unsigned inti=0;i

{****

//add particle to its associated box in the particle grid****

particle_grid[particles_received[i].location_number()].insert(pair(particles_received[i].global_part_num(),particles_received[i])); ****

//check to see if the particle is contained within the box****

if(particles_received[i].position().y()>grid_locations[particles_received[i].location_number()].bottom() ****

&& particles_received[i].position().y()

&& particles_received[i].position().x()>grid_locations[particles_received[i].location_number()].west() ****

&& particles_received[i].position().x()

&& particles_received[i].position().z()>grid_locations[particles_received[i].location_number()].south() ****

&& particles_received[i].position().z()

{****

//if particle is in box, then denote it as such in the particle properties****

particle_properties[particles_received[i].global_part_num()].particle_in_box()[particles_received[i].location_number()]= true;****

}****

}****

receive_counter++;****

}****

msginfo=world.iprobe(mpi::any_source, world.rank());* ***

}****

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I have left out variable definitions, but everything has the right type (including sending and receiving the same type-particles_to_be_sent[i] and particles_received are both vector<Particle>, where Particle is a type I’ve created).****

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I thought that boost mpi is supposed to take care of making the receive buffer the right size on its own, but something isn’t working here. Any help would be appreciated.****

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Thanks,****

Kyle****

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