# Delete file if it exists if ( length(list.files( pattern = "asreml+(([a-zA-Z0-9_.\\-])*)+(.zip|.tar.gz|.tgz)", recursive = TRUE )) > 0 ) { file.remove(list.files( pattern = "asreml+(([a-zA-Z0-9_.\\-])*)+(.zip|.tar.gz|.tgz)", recursive = TRUE )) }