| ERROR | invalid REFRESH method |
| CAUSE | The NEVER REFRESH option may not be used under the following conditions: * The materialized view is updatable * The materialized view refreshes ON COMMIT * Automatic refresh options are specified |
| ACTION | For updatable materialized views, reissue the SQL command using REFRESH FORCE, REFRESH FAST, or REFRESH COMPLETE. For read-only materialized views, reissue the SQL command using ON DEMAND. |