CFX Distributed Parallel in ANSYS CFX 13 uses HP-MPI while CFX Distributed Parallel in ANSYS CFX 14 uses PCMPI. These different installations of MPI can have a conflict when installed on the same Windows machine. To avoid such a conflict, be sure to follow the installation instructions that appear during Platform MPI installation. "
The only workaround is to unset or delete MPI_ROOT. This should allow CFX-13.0 and CFX-14.0 to run independently.
To Remove this Variable
Open up Control Panel > System > Advanced > Environment Variables. The MPI_ROOT will be in the System Variables. Delete this variable.
