As @MotleyG wrote: you are missing the dot following the number and got 1 hyphen too many.
In that respect you did not follow my steps
What would also be interesting for us, sitting far away from you:
Has it worked to import data from
?
Also, I would have expected that you would have wandered through the FAQs a little more.
As a filename with a leading number is described there as an FAQ topic.
The same example can be found in the documentation about Converters: