Hi, I have a struct as - struct A { int size; int *lptr; }; And then I have array of such structure, I want to only send dynamic array present in each of the structs to other process. One of the options is to do it with MPI_Pack but then I have read it is not so good from performance point of view. What can be the other opt -- Regards, -- Mahesh Doijade MTech - II (CSE) , Walchand College of Engineering, Sangli