Hey,<br><br>I have not experienced the parallel run of RegCM3 with OpenMPI but as far as mpich2 is concerned, there is need to change the compiler option in Makefile located in &quot;main&quot; folder of RegCM3 pack like and then use it.<br>
<br>FC=ifort  (wrong option for parallel run)<br>FC=mpif90 or mpif77 etc etc.<br><br>Cheers:-)<br>Asif<br><br>-- <br>Muhammad ASIF<br>