Help with error please: "dump 1 on file" on MCNP

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The "dump 1 on file" message in MCNP indicates normal operation, as the software automatically generates dump files at the start and end of a run, with potential additional dumps during execution. These files are useful for debugging and can aid in restarting runs by adding more particles. Users should note that multiple tally reports may appear before all particles are processed. The PRDMP card can be utilized to control the dump process, and consulting the user manual is recommended for effective debugging. Overall, the presence of dump files does not signify an error, and no issues were found in the output file.
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I don't know what the problem is.
I hope someone can solve this problem.
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The dump thing is not a problem. By default, MCNP does a dump at the start of the run, and another at the end. And, depending on the settings and options, it may do additional dumps during the run.

The dump file contains information that may be useful for other purposes. For example, it may be useful in debugging or in re-starting a run to add more particles.

It will also print out additional information at each dump. You should be aware that there may be, for example, multiple reports of tallies. So the first (and all but the last, as there can be several) report of a tally may happen before all of your particles have been run.

You can control some of the dump process using the PRDMP card. Read up in the user manual about this card. It can be very useful when you are doing debug on a model.
 
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The dump file, as @DEvens indicated, contains information that could be useful for diagnostic purposes, so perhaps it would be just as well to also post the str.run file, instead of just posting the str.txt source file the processing of which caused the dump to be generated.
 
sysprog said:
The dump file, as @DEvens indicated, contains information that could be useful for diagnostic purposes, so perhaps it would be just as well to also post the str.run file, instead of just posting the str.txt source file the processing of which caused the dump to be generated.

The question has been sorted. The dump file is normal operation. There are no error messages in the output file produced.
 
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What type of energy is actually stored inside an atom? When an atom is split—such as in a nuclear explosion—it releases enormous energy, much of it in the form of gamma-ray electromagnetic radiation. Given this, is it correct to say that the energy stored in the atom is fundamentally electromagnetic (EM) energy? If not, how should we properly understand the nature of the energy that binds the nucleus and is released during fission?

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