Detecting Model Validity Problems
If you make changes to the underlying database schema or to the physical view (for example, if you remove tables or columns), the mappings in the logical model may no longer be valid. When Style Studio detects a validity problem in the field mappings, it highlights the invalid entities and attributes in red.
To determine the cause of a validity failure, follow the steps below:
1. Press the 'Refresh Metadata' button in the toolbar to verify that Style Studio has access to the current schema information.
2. In the logical model, hover the mouse over the 'Name' field or 'Physical Mapping' field of the red-highlighted attribute. This displays a message explaining the cause of the mapping problem.

3. When you have determined the source of the problem, adjust the database schema, physical view, or logical model to restore a valid mapping.
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