Fatal error: "entries are not monotonically increasing"

[Basmah]

I have encpuntered this error with the gamma spectra "entries are not monotonically increasing". Despite attempting the following solutions, the issue remains unresolved:

• Rearranging Energies in ascending order.
• Removed any duplicate energy values.

What may be causing this error? and how can I solve it?

 

[Alex A]

Welcome to PF @Basmah,

The SI card defaults to H, a histogram with monotonically increasing entries, which this input data very much isn't. That would make sense if this is a distribution being modeled. If this is a gamma spectrum then the table is probably a series of discrete energies and probabilities so the SI card should start with an L

So I suggest you go back to your original data before you tried to order it, use L and see if the spectrum (try a simple geometry, no materials, a tally with energy bins) is what you expect.