* installing *source* package 'mapmixture' ...
** using staged installation
** R
** inst
** byte-compile and prepare package for lazy loading
Error in readRDS(nsInfoFilePath) : unknown input format
Calls: <Anonymous> ... namespaceImportFrom -> asNamespace -> loadNamespace -> readRDS
Execution halted
ERROR: lazy loading failed for package 'mapmixture'
* removing 'd:/RCompile/CRANincoming/R-devel/lib/mapmixture'