No input data found for 'Tutorial1_21.bnn'

Dear all,
I just downloaded my FLUKA and tried to run a tutorial file. As I process my data, I can’t creat my Tutorial1_21.bnn file. The output shows like:
“”
WARNING: No input data found for ‘Tutorial1_21.bnn’
Error processing: Tutorial1_21.bnn
Ended: 2020.08.12 01:03:33

Warning
Possible errors: Tutorial1_21.bnn
Correctly processed:
“”
and the status for Data is Error.
As I emerge to my USERBIN output, it shows like:
“”

e> ERROR: Error loading USRBIN file
[Errno 2] No such file or directory: ‘/Users/gengqiaolei/FLUKA/Tutorial/Tutorial1_21.bnn’

“”
What should I do?
Cheers,
Best regards,
Charlie

Dear Charlie,

the reason could be that the simulation did not finish successfully. Please check the produced .out, .log and .err files if there was an error.

Cheers,
David