Hi,

I want to do pathway analysis with "ReactomePA" in R, I installed all dependencies but I get this error:

Error : Functions found when exporting methods from the namespace ‘S4Vectors’ which are not S4 generic: ‘grep’, ‘grepl’ Error: package or namespace load failed for ‘DOSE’

It sounds like you have a mixture of current and out-of-date or too-recent packages. Try BiocInstaller::biocValid() and follow instructions to make your packages consistent.