| ERROR | USING clause is incompatible with its supertype |
| CAUSE | The USING clause of a type has to be the same as its supertype or compatible with it. |
| ACTION | Make sure the USING clause is compatible with its supertype. |
| ERROR | USING clause is incompatible with its supertype |
| CAUSE | The USING clause of a type has to be the same as its supertype or compatible with it. |
| ACTION | Make sure the USING clause is compatible with its supertype. |