[Bioc-devel] Error on Mac OS

Hi all, could anybody help me with this warning? It appears only in MAC OS. My package was already checked and was OK last time. Thanks in advance!

Loading required package: XVector
Error: package BiocGenerics 0.19.1 is loaded, but >= 0.19.2 is required by XVector
In addition: Warning message:
version 0.19.2 of BiocGenerics masked by 0.19.1 in /Users/pkgbuild/Library/R/3.3/library 
Execution halted

It looks like this package has a loading problem when not on .libPaths:
see the messages for details.

Estefania