This error usually appears when there are columns missing from your tables. So if a class has a property mapped to table column that is missing from the database then you will see this error.
This error usually appears when there are columns missing from your tables. So if a class has a property mapped to table column that is missing from the database then you will see this error. Basically check for mismatches between your mappings and your database tables (missing columns, type mismatches etc).
The problem may be on a related table/entity and not on the one you are trying to save.
Someone responded in another post that I had two extra mapping attributes. One for property and another as keyed so I'll give you the point for being close. – Brian Dec 24 '09 at 3:01.
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