Parallel issue when increase number primary

Dear David,
Thanks so much unfortunately I can not find any good reference to set reasonable interaction length biasing factor (Bias inter-L), as I understand from this topic:

just I play with the number until the number of generations of muons will be stable.

Do you know any recommendation reference for setting number Bias inter-L?

By the way I test my simulation when I increase Bias inter-L and it is work…
Best regards,
Mohammad