Hello Giuseppe,
as your suggestions i have get a *.fort.90 files, and i used it as source by source_newgen.f successfully. i have some abuse about the normalization formula,
Please correct me if I am wrong.
Total weight(recorded) = sum all weight value of *.fort.90 file, and
Total weight(step1)= total weight at the end of *.out file to step-1,just like 1e+4 for " Total number of primaries run: 10000 for a weight of: 1.000000E+04"
Regards,
Eddie