null character without reason in written files

[unomas]

>> > What is the exact command
>> > line that you use to compile the code.
>
> this is the reason why I asked about the command line.
> Are you doing something like
>
> gfortran -DEBUG -DSOMETHING -o z -O2 file.F90

I don't use -DEBUG. I use -D only as

CPPFLAGS = -DBINDIR=\"$(SCRIPTS)\" -DPKGDATADIR=\"$(CURRENT_DIR)\"

and I use -O3 (and -o).

> However, as you are using a Fortran95 compiler, it
> comes with a PRNG.  See the manual for RANDOM_NUMBER intrinsic
> subroutine.

I know it but that's not a RNG with good statistical properties.