Error with the choice of material

Dear Fluka expert!
Could you please help me find the error in my modeling.
I want to make a very simple calculation of the dose for the interaction of a 22 MeV electron beam with a target which material is graphite.
When I run the program, it stops due to some kind of error, but I cannot figure out what is wrong (it does not give error messages).
Then I change the target material, it starts working fine.

In the attachment, you can find the input file,
window_127.flair (1.9 KB) window_127.inp (1.4 KB)

Thanks and Best regards


Please, if possible, take a look and tell me what is wrong and how can I fix this error?

Dear Zohrab,

please have a loot at this topic:


Dear David

Thanks a lot for information.

Best regards