“ENOENT, open”在使用连接多党参数“uploadDir”时使用(Express 4)

I am using connect-multiparty with Express4/Node/Angular. Running it locally, on a file upload, I get a 'ENOENT open' error when I specify an 'uploadDir', but it works with the default multipart().I am using connect-multiparty with Express4/Nod