The following floating-point exceptions are signalling

Running and Runtime Errors
1

Dear fluka experts，

My program terminated unexpectedly，there is a sentence in the .log file “Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL”
I will upload my input file，please take a look for me if you have time.

remix.inp (6.0 KB)

Li

2

Hello Li,

Can you try whether reducing the number of bins in your USRBINs lifts the stop?

Thanks,

Cesc

3

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 exponent usually having a limited range). Such numbers are represented using leading zeros in the significand.

The unexpected STOP of FLUKA is unrelated to these messages.

As @cesc pointed out, and possibly the error message at the end of the .out file suggests, you run out of the memory usable for scoring.

Cheers,
David

4

Thanks for your reply，it works.

5

I run out of the memory usable for scoring with a certain capacity，so should I reduce the number of scoring cards or the number of bins of every scoring cards?

6

Dear Li,

it is completely up to your needs. At the end what matters is it the total number of bins across all scoring cards.

Cheers,
David