I got an
PDOException: SQLSTATE[HY000]: General error: 1366 Incorrect integer value error on one of the fields for a content type that I'm importing from a D6 site to a D7 site, and the import of all those nodes is failing. I looked at the field on the Field Mappings page, and found that the field is not in the Source dropdown menu, and therefore cannot be mapped. I think this is why the import is failing. The field exists in both the source D6 database and the destination D7 database.
How do I get Migrate D2D to recognize this field so that it appears in the field mappings menu?