| ERROR | field element ~S is not a simple type |
| CAUSE | The field element evaluated to a node-set with a member that was not a simple type. |
| ACTION | Change the field elements type. |
| ERROR | field element ~S is not a simple type |
| CAUSE | The field element evaluated to a node-set with a member that was not a simple type. |
| ACTION | Change the field elements type. |