| ERROR | attribute prefix missing in aggregate specification: string |
| CAUSE | An attempt was made to specify an aggregate predicate across multiple primitive event types with no attribute prefix. |
| ACTION | Correct the input and try again. |
| ERROR | attribute prefix missing in aggregate specification: string |
| CAUSE | An attempt was made to specify an aggregate predicate across multiple primitive event types with no attribute prefix. |
| ACTION | Correct the input and try again. |