“Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL”

[Cesar (Cesar Rendon)]

Dear Fluka experts,
I am trying to find out how to run a simulation in Fluka for big structures like a mountain … well actually I don’t know if I can do it.
I prepared a .inp file but when I tried to run it the error “Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL” appears.
Can I run one simulation like this?
I have read that this error could be due the bins.
I have attached the file if you want to have a look, in this file the mountain is a toy … I am going to reproduce it with voxel geometry when the .inp run without errors.

Thanks a lot in advance,
Cesar

cosmicrays4-source.inp (4.1 KB)

[horvathd (Dávid Horváth)]

Dear Cesar,

please see:

The following floating-point exceptions are signalling

Dear Li, the IEEE_UNDERFLOW_FLAG and IEEE_DENORMAL messages are normal, and can be ignored. The meaning of the message is explained on Wikipedia: In a normal floating-point value, there are no leading zeros in the significand; rather, leading zeros are removed by adjusting the exponent (for example, the number 0.0123 would be written as 1.23 × 10−2). Denormal numbers are numbers where this representation would result in an exponent that is below the smallest representable exponent (the expon…

Cheers,
David