| ERROR | object string is invalid |
| CAUSE | An invalid package specification or stored subprogram was referenced. A package specification or stored subprogram is invalid if its source code or any database object it references has been DROPped, REPLACEd, or ALTERed since it was last compiled. |
| ACTION | Find out what invalidated the package specification or stored subprogram, then make sure that Oracle can recompile it without errors. |