Hi all, I'm having difficulties passing data from the master to the children. I haven't seen any complete tutorial, all the tutorial broadcast data where I would like to send parts of my big tablechip list. Everytime I run this, the last line always jams. I even tried to reduce the number of rows in data to 10 and still doesn't work. I even tried to do a remote.exec(ls()) and doesn't work. Any tips? #sending my function mpi.bcast.Robj2slave(forSlaves) #sending a message to all children so they wait for data mpi.bcast.cmd(cmd={data = mpi.recv.Robj(mpi.any.source(),mpi.any.tag())}) # Now, send the data to the children for( i in 1:nrow(adds)){ print(paste("sending part:",i)) data = data.frame(tablechip[[1]][adds[i,1]:adds[i,2]],tablechip[[2]][adds[i,1]:adds[i,2]],tablechip[[3]][adds[i,1]:adds[i,2]]) mpi.isend.Robj(data,i,i) } #next line jams results = mpi.remote.exec(forSlaves()) Thanks, Remi [[alternative HTML version deleted]]