| ERROR | skipping datafile string; already backed up on string |
| CAUSE | The indicated datafile will not be included in the backup set. It is already been backed up once, or before the since time specified. |
| ACTION | No action is required. |
| ERROR | skipping datafile string; already backed up on string |
| CAUSE | The indicated datafile will not be included in the backup set. It is already been backed up once, or before the since time specified. |
| ACTION | No action is required. |