Hi All,

I am looking for a script for annotating  Entrez Gene IDs to my coordinated peak files (MACS file.bed) and I am trying to install different package such as ChIPpeakAnno or TxDb.Hsapiens.UCSC.hg19.knownGene but I am troubling of understanding what this error message means :

> library(TxDb.Hsapiens.UCSC.hg19.knownGene)
> g = genes(TxDb.Hsapiens.UCSC.hg19.knownGene)

Error in `seqinfo<-`(`*tmp*`, new2old = new2old, pruning.mode = pruning.mode,  : 
  could not find symbol "force" in environment of the generic function
> 

I am really new in this field so it might be a really stupid question but if someones could help me out, I would really appreciate it. 

Thank you very much

Melissa

Check that your packages are at the correct version, using

BiocInstaller::biocValid()

Follow any advice about updating 'too old' or 'too new' packages.