Username in use error message

I have a file of about 109 users I would like to add. The format of the csv file is:

Name Email Username Block Register Date Account Activation Params User Group
Alxx Bx axxx@yahoo.com abxxx 0 9/1/2014 0:00 {} 18

When importing, I get the error message shown in the attached file. "Username in use". I exported the existing user database and ensured that no user name in field "Name" was named "Username". I also stripped row one from the CSV file and assigned fields manually.

Here is the profile for the import

Hi,

Users records you are trying to import do have at least one record with the username which is already there in Database.
e.g. You are importing a user with username "abxxx" and there is already a user with the same username in Database.

Thanks for the quick reply.

After I last posted, I exported the entire user database and opened in Excel. I then pasted in the additions and checked for duplicates on usernames and email addresses. No duplicates found. I checked for username length and special characters not allowed in username string. If Joe Smith was jsmith, a new user with the name John Smith would be something like jsmith082014 or jsmith_082014.

Hi,
Please send us your back end login credentials and CSV file via Contact Us form, We'll look into it.