[R-pkg-devel] How to fix: non-standard things in the check directory: 'NUL' ?

[Friedemann von Lampe]

Hi,

when trying to update my package on CRAN it is rejected, because it gets 
a note during checks on Debian:

Flavor: r-devel-linux-x86_64-debian-gcc
Check: for non-standard things in the check directory, Result: NOTE
Found the following files/directories:
'NUL'

There is no such file in my folder and therefore it can't be removed. 
With Windows everything is OK.
As far as I understood, this is a problem with Rhub? 
(https://github.com/clessn/locateip/issues/99)

Or what can I do, to fix this problem and get my package update 
submitted to CRAN?

Thanks,
Friedemann von Lampe