| ERROR | attribute set used for an Expression set may not be modified. |
| CAUSE | An attempt was made to add an elementary attribute to an attribute set assigned to an expression set. |
| ACTION | Un-assign the attribute set and try again. |
| ERROR | attribute set used for an Expression set may not be modified. |
| CAUSE | An attempt was made to add an elementary attribute to an attribute set assigned to an expression set. |
| ACTION | Un-assign the attribute set and try again. |