MCNPX memory error: "bad trouble in imcn in routine dynamic allocation"

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SUMMARY

The forum discussion addresses a memory error encountered in MCNPX, specifically the "bad trouble in imcn in routine dynamic allocation" error. This issue arises when defining a hexagonal fuel assembly with the parameters lat=2 and fill=-17:17 -17:17 0:0. The discussion emphasizes the importance of providing a complete input file or a simplified version that replicates the error for effective troubleshooting.

PREREQUISITES
  • Understanding of MCNPX simulation software
  • Familiarity with hexagonal fuel assembly configurations
  • Knowledge of input file formatting in MCNPX
  • Basic troubleshooting techniques for simulation errors
NEXT STEPS
  • Review MCNPX documentation on dynamic memory allocation errors
  • Learn how to create and format input files for MCNPX simulations
  • Explore techniques for simplifying complex MCNPX problems
  • Investigate common issues related to hexagonal fuel assembly definitions in MCNPX
USEFUL FOR

This discussion is beneficial for nuclear engineers, MCNPX users, and researchers involved in simulation of nuclear systems, particularly those working with hexagonal fuel assemblies.

Nagib Benamer
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I would like to ask about this error " bad trouble in imcn in routine dynamic allocate"
this came up when I described a hexagonal fuel assembly with lat=2 fill=-17:17 -17:17 0:0 but it gave the error above. is there a maximum for this?
 
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Welcome to PhysicsForums @Nagib Benamer,

That looks fine. It would probably help to show us more of the problem, ideally a full input file if you are able. If you are not able to share the full input file, then if you can cut the problem down to make a smaller problem that still produces the same error, that would also be helpful. If you wish to attach an input file you will need to change the file name to add .txt
 
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