| ERROR | could not access datafile number | 
| CAUSE | A backup or copy could not proceed because the datafile header could not be read or the header was not valid. | 
| ACTION | Make the datafile accessible or skip it. | 
| ERROR | could not access datafile number | 
| CAUSE | A backup or copy could not proceed because the datafile header could not be read or the header was not valid. | 
| ACTION | Make the datafile accessible or skip it. |