solve fluent problem

ok, so today learn how to fix the error in fluent due to parallel processing,

 http://www.cfd-online.com/Forums/fluent/85262-error-fluent-parallel-processing.html

I don't mean to bring up a thread that hasn't had any new posts in over a month, but I found this by googling (first hit) and assume others might as well.

I'm using Fluent from Ansys V13 and had a similar issue where the program would hang while trying to spawn nodes. I had installed Intel MPI (not HP, but it's possibly similar) and to fix the problem, I ran wmpiregister. I'd assume if you installed HP MPI it would be similar. You have to register your username for windows and give it a password (which I believe must match between windows and whatever mpi you're using). 

Then, when starting Fluent, under the more options section/parallel settings tab, under MPI types I denoted that I am using Intel MPI instead of default.

Works fine now and no more hanging. Hope that helps anyone who finds this.