[mpich-discuss] MPI_Datatype for a structure containing pointers

Good morning, I want to send (scatter) an array of N element of the structure below, with sizeof(Tab)=T struct bloc { int T; double *Tab; }; typedef struct bloc BLOC; I wonder if it is possible to create a new MPI_Datatype for this structure (the size of Tab depends on T), or the only way is to sent it as an array (using Scatterv). Thanks for your help.