Why Does Changing the Splitting Mesh in MCNP5 Affect Histories and File Outputs?

[gurps409]

HIya, I am not actually sure why this is happening so was wondering if anyone can help.

im running in photon mode and I am trying to generate a weight window. initially i think my splitting mesh was over done a little bit (ok too much say about 15 fine intervals in a 10cm region) and i wouldn't go past one history. just billions of collisions were occurring. I reduced the number of splitting and now I am getting histories but why did this happen? my geometry is fine but is very complicated.

now that I am getting histories, and scoring in some of the regions i want but I am not getting a wwgout file. i do, however, get a warning saying some of my particles have escaped the wwg mesh.

thanks in advanced. i am relatively new to mcnp but I am on a mission to learn this!

 

[junaidarshad]

The problem is Solved.
It was because of the conflict of libraries (openmpi and mpich2).