Hi all,
I'm wondering if anyone's had experience with the WordPress Importer tool. I'm having trouble importing my WXR file through the tool. It works well for the most part, but when I get to the author assignment section, there are some issues. Under Assign Authors I only see Import author: (), with nothing in the parentheses. Once I submit the page, the next page says

Failed to create new user for . Their posts will be attributed to the current user. Cannot create a user with an empty login name.

I don't know why there's a blank space after "for", and why it would say "empty login name." I checked the XML file and it appears to have the right fields populated. I'm hoping someone has experience with this and can offer some advice.

Go to Settings->general then click check box "Anyone can register".
After this change please import again xml file. it works well.