psftp get unable to open

psftp>get a.tar
local: unable to open a.tar
psftp> lpwd
Current local directory is C:\Program Files\PuTTY
psftp> lcd B:\
New local directory is B:\
psftp> get a.tar
remote:/home/guqq0717/a.tar => local:a.tar

如果psftp的get命令出错“get unable to open”，运行lpwd，看看本地目录是否可写。