Error loading USRBIN file

Dear Fluka experts,

this is my first time using Fluka, i ; trying to plot the result of a simulation of a photo nuclear reaction , but i don’t know the reason of the error that appears in the output
hope you will help me fix it.

Dear Ibrahim,

did you merge the results of the different cycles? If not, please have a look at the Flair tutorial (Official flair site), especially part 8.