On Mon, Nov 19, 2018 at 10:14:54AM -0500, Zhifeng Yang wrote:

Thank you for helping me on this error. Actually, real.exe is a portion of a very large weather model. It is very difficult to extract it or duplicate the error in a simple fortran code, since I am not sure where the problem is. From your discussion, I barely can understand them, in fact. Even I do not know what is "_get_addr". Is it related to MPI?

It is difficult to pin-point the problem without reproducing it. Anyway, let's start with mpirun. What is your output if you try: mpirun --version Next, what is your mpich version? If you built mpich, locate the `cpi` program in the examples folder and try `./cpi` and `mpirun ./cpi`. Do you have error? -- Hui Zhou