R help - May 2020 - How to use pakcage R0

>> R0 = estimate.R(germany_vect, mGT, begin=germany_vect[1],
> end=germany_vect[length(germany_vect)], methods="EG",
pop.size=pop_de,
> nsim=100)
> 
> Error in begin.nb:end.nb : argument of length 0
> 
>> germany_vect[1]
>   1
> 184
>> germany_vect[length(germany_vect)]
>  57
> 488
> 
> ```
> What might be the problem here?
begin = germany_vect[1]
So begin = 184

but do you not want begin = 1

and same for end?