| ERROR | This method has already been performed - repeat operation? |
| CAUSE | Warn user the repetition of previous method used W3CLIB_MSG = 12 |
| ACTION | The user agent client takes proper actions |
| ERROR | This method has already been performed - repeat operation? |
| CAUSE | Warn user the repetition of previous method used W3CLIB_MSG = 12 |
| ACTION | The user agent client takes proper actions |