Make sure that required columns are listed, and populated.
Verify that there are no invalid characters or additional commas in the .csv file that is being used for uploading.
Duplicate entries will be skipped and not updated during the upload process.

*Note: First Name, Organization Name, and Email Address are required fields for the .csv file.

Available workaround:
1. Select the option to Import from Outlook/Outlook Express
2. Browse to the .csv file.
a.  Be sure that the column headings used in the .csv file are as follows:
First Name    Last Name    Organization Name    Email Address    Home Phone    Business Phone
3. Select Import