今天使用FileZilla FTP程序上传网页到虚拟空间，上千个文件上传完毕，总是有几十个文件无法上传成功，提示550错误。联系虚拟空间管理员重设FTP用户权限后仍然不行，根据下面的分析，应该是有人在使用这些文件，无法上传吧。这些上传不成功的文件，都是在虚拟空间中只有文件名，大小都为0.
550 index.htm:无法创建文件。上传的文件名是index.htm。可能由以下原因引起：该文件已经存在，你无法覆盖它；你没有足够的写入权限在当前上传的目录中，通常550代码指的就是在远处的FTP服务上，你没有足够的权限，写入遭到拒绝。。
550 index.htm: Cannot create file
Error: 550 index.htm: Cannot create file
When trying to upload a web page the following error is encountered:
550 index.htm: Cannot create file
The name of the uploading file is "index.htm".
This usually means one of two things:
The file already exists and is in use so you cannot overwrite the file.
You do not have permission to create the file in the directory where you are currently located. A file upload is being attempted but the remote server has denied the needed permission. The 550 error code is a result of insufficient account privileges on the remote FTP server. The error is not caused by SmartFTP. If you believe that your FTP account privileges or permissions are configured incorrectly, contact your Web hosting company for help.if this article did not suffice your needs and answer your questions please let us know why。
