In order for the Data Masker software to function, it needs to be aware of the tables in the target schema and their structure (column names, column types, column sizes etc). This information is usually automatically acquired when the masking set is created. The schema structure can be refreshed using the Refresh Schema and Indexes button on Options tab of the edit Rule Controller form.

The Data Masker Set Tables Tab
The panel on the top of the Tables In Set Tab shows the tables in the Masking Set. Each table can expand to show the column structure of the table. Beside each table is a column indicating the number of rows in the table and several columns which indicate any configured (it is optional) masking plan state for that table or column.
If the required table is not present in the list, then the schema information will probably need to be refreshed again. Use the Refresh Schema and Indexes button on Options tab of the edit Rule Controller form to reload this information.
Note:A right mouse button click on any table name will cause a small menu to appear offering the option to see the columns, foreign keys and indexes for a particular table.
What the Buttons do