Voxel

Dear Fluka users,
I have some problems when producing the .vxl file for the voxel
geometry in Fluka.
I used the writect.f file I give in attachment to read the ascii
file of a box made of:
NX = 180 cubes
NY = 240 cubes
NZ = 194 cubes
I managed to produce the executable but when launching it the message
of the shell is the following, referring to my input file (ashii_shi),
which is something like:

1 1 1 2 2 1 1 1 2 3 4 4 4 1 1 1 ? (for 40)
1 1 2 2 1 1 1 2 3 4 4 4 1 1 1 3 ? (for 40)
?

invalid number: incomprehensible list input
apparent state: unit 30 named ascii_shi
last format: list io
lately reading direct formatted external IO
Aborted (core dumped)

Should I modify the writect subroutine somehow? Is it
because the data are too many: 180x240x194 small cubes dimension 5cm?
Thank you for your help,
My best regards and also? my best wishes for a happy new year!
Beatrice Pomaro