* installing *source* package ‘OPCreg’ ...
** this is package ‘OPCreg’ version ‘0.1’
** using staged installation
** R
Warning: file ‘IPCR.R’ is invalid UTF-8
Warning: file ‘PCR.R’ is invalid UTF-8
Warning: file ‘PPCR.R’ is invalid UTF-8
Warning: file ‘SPCR.R’ is invalid UTF-8
Error : invalidly encoded .R file(s)
ERROR: unable to collate and parse R files for package ‘OPCreg’
* removing ‘/srv/hornik/tmp/CRAN_pretest/OPCreg.Rcheck/OPCreg’