Error
Error Code:
Not loaded - critical error
Error Message:
Missing value in the following required column: Last Name
Contact upload failure error messages may be viewed under Contacts > Uploads> . Selecting the
upload results icon next to the desired file opens the Upload Results page, where the error is displayed.
Root Cause
This error means that a Last Name was not provided for the contact.
Solution
Ensure that each contact in the upload file includes a value in the Last Name column.
The following file would cause this error because a Last Name was not provided for the contact.
The following file shows a corrected upload in which each contact record includes a value in the Last Name column.