The error, "Error 000852: Cannot add field <value> to <value>." is returned when attempting to add a non-nullable date field to a feature class stored in a DB2 geodatabase.

Workaround

Create a field with 'Allow Null' check box checked, and save the field. Optionally, after the field is created, uncheck the 'Allow Null' check box, and re-save the field.

Steps to Reproduce