Chg_mem error problem with MCNP

  • Thread starter Thread starter zhangxm
  • Start date Start date
  • Tags Tags
    Error Mcnp
Click For Summary

Discussion Overview

The discussion revolves around a problem encountered when running MCNP on different operating systems, specifically the "chg_mem error" that occurs on Windows 10 but not on Windows XP. Participants explore potential causes and solutions related to software versions and input file characteristics.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant reports that their input file runs correctly on Windows XP but produces a "chg_mem error" on a more powerful Windows 10 system.
  • Another participant suggests that the issue may be related to using an outdated version of MCNP, specifically version 4.
  • A participant clarifies that they are using MCNPX 2.5 and MCNP5, and notes that the input file works on an older computer but fails on the newer system.
  • One participant offers to test the input file with MCNP and MCNP6 on Windows 10.
  • It is noted that reducing the number of voxels in the input file allows it to run correctly on Windows 10, while larger voxel counts lead to the "chg_mem error."
  • Another participant expresses having the same issue with Windows 10 and seeks resolution.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the cause of the "chg_mem error," with multiple competing views regarding the software version and input file characteristics. The discussion remains unresolved.

Contextual Notes

Participants mention specific software versions and the impact of voxel count on the error, indicating potential limitations in the software's handling of memory with larger datasets. However, no definitive conclusions are drawn regarding the underlying cause of the issue.

zhangxm
Messages
4
Reaction score
0
TL;DR
Hi,
I have a problem with MCNP. The problem is : the input file can run correctly on WindowsXP system,but when I run it on a more powerful computer with win10 system , the MCNP showed "chg_mem error". How to solve this problem?
Hi,
I have a problem with MCNP. The problem is : the input file can run correctly on WindowsXP system,but when I run it on a more powerful computer with win10 system , the MCNP showed "chg_mem error". How to solve this problem? can MCNP only operate on winXP or win2000 system?
 
Engineering news on Phys.org
zhangxm said:
can MCNP only operate on winXP or win2000 system?

No !
perhaps you have a very old version of MCNP (4 ?)
 
PSRB191921 said:
No !
perhaps you have a very old version of MCNP (4 ?)
The version is MCNPX 2.5 and MCNP5. I use the input file of human voxel phantom to calculate organ dose, it can run correctly on an older computer with winXP system , which run very slowly due to the poor ability of the cpu . So I transfer it to a more powful computer with intel Core i9 cpu and win10 system, then i run it with the MCNPX 2.5 and MCNP5 respectively which were installed correctly on the above computer, but the result showed chg_mem error. What's the reason ?
 
can you give your input file ?
I can try with mcnp and mcnp6 with windows 10,
 
PSRB191921 said:
can you give your input file ?
I can try with mcnp and mcnp6 with windows 10,
thanks you a lot. can you give me your email address? so i can give you the input file.
or you can email me to the address: amms_zhangxm@163.com
 
PSRB191921 said:
No !
perhaps you have a very old version of MCNP (4 ?)
I found if the number of voxels is lower, for example 1500000, the input file can run correctly on the win10 system, but if the voxel number is bigger, for example above 19000000, it will show the chg_mem error
 
PSRB191921 said:
can you give your input file ?
I can try with mcnp and mcnp6 with windows 10,

I have the same problem with Win 10! how can I resolve it?
thanks!
 

Similar threads

MCNP vs Serpent pin-cell burnup discrepancy in keff evolution
  • · Replies 5 ·
Replies
5
Views
2K
MCNP Deck Error: cannot create srctp
  • · Replies 1 ·
Replies
1
Views
2K
MCNPX ver 2.7 error: ''bad problem in xact in routine tpefil chg_mem error''
  • · Replies 3 ·
Replies
3
Views
3K
MCNP4C suppressing terminal/console window popping up?
  • · Replies 3 ·
Replies
3
Views
2K
If MCNP tallies are normalized, shouldn't they be <1?
  • · Replies 5 ·
Replies
5
Views
4K
MCNP6: error -- "bad trouble in imcn" is usually tangled with spacing error?
  • · Replies 6 ·
Replies
6
Views
7K
Run MCNP 5 input file of certain geometry for flux calculation
  • · Replies 8 ·
Replies
8
Views
3K
MCNP5 tallies conversion and MCNPX
  • · Replies 1 ·
Replies
1
Views
3K
Geometry error: no intersection found in mcnp
  • · Replies 3 ·
Replies
3
Views
4K
Why is My MCNP Burnup Calculation Failing?
  • · Replies 1 ·
Replies
1
Views
3K