Database Errors

Common database errors.

Error: Found UTF-8 BOM but encoding was iso-8859-1 for file
Encoding error messages
Error: Mailing has dynamic content with a rule referencing a query that contains universal behavior criteria.
See how you can fix your email send error.
Error: Merging List
Merging list error
Why does an error message tell me I cannot update contacts?
Error message when updating contacts
Error: Sorry, we are unable to add the contact. A duplicate contact already exists.
Duplication error when adding contacts
What does Error: System Error Processing Contact Source Delete Job mean?
Error when deleting a database
Error: Unable to Find Custom Key Field Contact ID in the mappings
Unable to find custom key field error
What does the you have reached your maximum lookup key limit error mean?
Maximum lookup key error
Error: The following contact sources cannot be deleted
Deleting contact sources error message
Why is the database contact count incorrect after adding or removing contacts?
Adding or removing contacts from the database count
Why is Set Field Values updating more contacts than in a query?
You ran a Set Field Values operation on a database, and used a query to define which contacts to update. When I checked the data job for Set Field Values, it showed more contacts were updated than there were in the query. Why?
Why is the database showing number of contacts, but the email is no longer sent?
Check out how to solve the problem of having zero contacts.
Database of contacts results in a smaller list size
Within Classic Single Email Reports, I've clicked the option to Create Database of Contacts. However, the newly created list does not contain as many contacts as I expect.

Parent topic: Troubleshooting