How to finally run an input file via VISED/MCNP5 without error?

[nuclearsneke]

TL;DR Summary

MCNP and eof error

Howdy, my fellow nuclear colleagues!

I am new to MCNP5 and currently I am trying to simulate something simple like a sphere of UO2 to calculate its critical size.
Whenever I run my file via MCNP5 or Vised, I get an error message like

bad trouble in subroutine pass1 of imcn

unexpected eof in file uo2crit0

I understand that problem is somewhere in geometry sector, because when I cut off all the lines above the geometry section, visual editor still crashes with lines specified before.

Detes are in the files attached.

 

[Alex A]

Hi,

You have ? chars where I would expect empty lines. When I fix that it seems to work for me. Checked in Ljnux.

 

[raining Pete]

Hello! Welcome to the forum. I am not an expert in MCNP5, but I have some experience with it. From the error message you provided, it seems like there is an issue with your geometry section. Have you checked all the inputs and made sure they are correct? Sometimes a small mistake in input values can cause errors like this. Also, have you tried running your file with a simpler geometry first, just to make sure the issue is not with the software itself? Let me know if you need any further help.