Hi Dear Sir I configure MPICH2 with ch3:sctp channel,then the configure has been complete and make & make install done successful. Now I don't know how use sctp channel for example MPI...? my command : mpiexec -np 2 exampleapp2mpi. but this example doesn't run base to sctp channel Can you help me? -- *Best Regards* *Hamideh Jabalameli* M.Sc Candidate, School of Electrical and Computer Engineering, College of Engineering, Electronici Shahid Beheshti Tehran University [email protected] [email protected]