dear, you just put a fifth entry in kcode. if your number of particles is 5000, then put 5000*2 = 10000 or 15000 as fifth entry in your kcode. then see how it works...gsyou said:And the error is really tricky. When I set 5000 source histories per cycle on KCODE card, the error appeared every time at source particle no. 5688, and only one inactive cycle has run. But when I set 1000 source histories per cycle, the error disappeared, and MCNP seems run well. This really makes me confused. Does it imply any error in my input file?
This error means that the new source you have entered into the Monte Carlo N-Particle (MCNP) code is larger than the previous source, which can cause issues with the simulation and lead to inaccurate results.
This error occurs because the MCNP code has a limit on the size of the source that can be used in the simulation. If the new source is larger than this limit, the code will give the "overrun" error.
To fix this error, you will need to reduce the size of the source that you are trying to use in the MCNP simulation. This can be done by adjusting the parameters of the source, such as its size, shape, or intensity.
Yes, this error can significantly impact the accuracy of your results. If the source is too large, it can cause the simulation to behave differently than it would with a smaller source, leading to incorrect results.
Yes, there are a few ways to prevent this error from occurring. One way is to carefully control and monitor the size of the source you are using in the simulation. Additionally, you can also check the MCNP code's documentation for the specific limits on source size to ensure that your source falls within those limits.