How to solve the error from gfortran?

Running and Runtime Errors
1

i do a simulation, when using a material below:

MATERIAL 1 1. H
MATERIAL 6 1. C
MATERIAL 18 1. Ar
MATERIAL 1.56E-3 CH4Ar
COMPOUND 1.0 C 4.0 H 9.0 ArCH4Ar
MAT-PROP 1. CH4Ar CH4Ar

the error occurs running the application, like this:
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL

it seems the error comes from gfortran, how to solve it?

2

Dear Siyuan1987,

it is not an error, see: The following floating-point exceptions are signalling - #3 by horvathd

Cheers,
David