| ERROR | Illegal block size |
| CAUSE | A negative number was given for the I/O block size to be used by the asynchronous I/O package. |
| ACTION | This is a programming error - use either a positive number or zero to get the default value. |
| ERROR | Illegal block size |
| CAUSE | A negative number was given for the I/O block size to be used by the asynchronous I/O package. |
| ACTION | This is a programming error - use either a positive number or zero to get the default value. |