* using log directory 'd:/Rcompile/CRANpkg/local/4.0/ch.Rcheck'
* using R version 4.0.5 (2021-03-31)
* using platform: x86_64-w64-mingw32 (64-bit)
* using session charset: ISO8859-1
* checking for file 'ch/DESCRIPTION' ... OK
* checking extension type ... Package
* this is package 'ch' version '0.1.0.2'
* package encoding: UTF-8
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking whether package 'ch' can be installed ... ERROR
Installation failed.
See 'd:/Rcompile/CRANpkg/local/4.0/ch.Rcheck/00install.out' for details.
* DONE
The installation logfile:
* installing *source* package 'ch' ...
** package 'ch' successfully unpacked and MD5 sums checked
** using staged installation
** R
Error in parse(outFile) : 
  D:/temp/RtmpALxf81/R.INSTALL14b2465974295/ch/R/Ryacas-all.R:46:13: unexpected input
45: #' @export
46: sym2poly <- \
                ^
ERROR: unable to collate and parse R files for package 'ch'
* removing 'd:/Rcompile/CRANpkg/lib/4.0/ch'