Hi

When trying to install GenomicRanges I encounter the following error (see below). I have started with a completely fresh install.  Installed using biocLite.

with regards

Lavinia Gordon.

Loading required package: IRanges
Loading required package: GenomeInfoDb
Error : Function found when exporting methods from the namespace ‘XVector’ which is not S4 generic: ‘compare’
Error: package or namespace load failed for ‘GenomicRanges’
> sessionInfo()
R version 3.3.1 (2016-06-21)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

locale:
[1] LC_COLLATE=English_Australia.1252  LC_CTYPE=English_Australia.1252    LC_MONETARY=English_Australia.1252 LC_NUMERIC=C                       LC_TIME=English_Australia.1252    

attached base packages:
[1] stats4    parallel  stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] GenomeInfoDb_1.6.3  IRanges_2.6.1       S4Vectors_0.10.2    BiocGenerics_0.18.0

loaded via a namespace (and not attached):
[1] zlibbioc_1.16.0 tools_3.3.1    

Somehow, GenomeInfoDb is version 1.6.3 (Bioconductor 3.2, previous) whereas IRanges is 2.6.1 (Bioc 3.3, current). biocLite() should have asked if you'd like to update old packages. Check the output of BiocInstaller::biocValid() and update as appropriate.