hi all, when compiling I receive the following error: package ‘ProtGenerics’ 1.16.0 was found, but >= 1.17.4 is required by ‘Spectra’ see below for details... Any clues? Thanks! Daniele

BiocManager::install("RforMassSpectrometry/RforMassSpectrometry")
Bioconductor version 3.9 (BiocManager 1.30.4), R 3.6.0 (2019-04-26)
Installing github package(s) 'RforMassSpectrometry/RforMassSpectrometry'
Downloading GitHub repo RforMassSpectrometry/RforMassSpectrometry@master
Downloading GitHub repo RforMassSpectrometry/MsExperiment@master
Downloading GitHub repo RforMassSpectrometry/Spectra@master
Running `R CMD build`...
* checking for file ‘/tmp/RtmpQrPLL4/remotes477e2a60ee6e/rformassspectrometry-Spectra-f1859d8/DESCRIPTION’ ... OK
* preparing ‘Spectra’:
* checking DESCRIPTION meta-information ... OK
* checking for LF line-endings in source and make files and shell scripts
* checking for empty or unneeded directories
* building ‘Spectra_0.3.0.tar.gz’
Installing package into ‘/home/colombo/R/x86_64-pc-linux-gnu-library/3.6’
(as ‘lib’ is unspecified)
* installing *source* package ‘Spectra’ ...
** using staged installation
** R
** byte-compile and prepare package for lazy loading
Error: package ‘ProtGenerics’ 1.16.0 was found, but >= 1.17.4 is required by ‘Spectra’
Execution halted
ERROR: lazy loading failed for package ‘Spectra’
* removing ‘/home/colombo/R/x86_64-pc-linux-gnu-library/3.6/Spectra’
Error: Failed to install 'RforMassSpectrometry' from GitHub:
  Failed to install 'MsExperiment' from GitHub:
  Failed to install 'Spectra' from GitHub:
  (converted from warning) installation of package ‘/tmp/RtmpQrPLL4/file477e1adeb2fb/Spectra_0.3.0.tar.gz’ had non-zero exit status

So in the code you gave us it says

Error: package ‘ProtGenerics’ 1.16.0 was found, but >= 1.17.4 is required by ‘Spectra’
Execution halted

which seems pretty explanatory?

Do note that the release version of Spectra is 1.16.0, so you likely need to use the devel version of Bioconductor to get the devel version of Spectra, which it appears is necessary.