When trying to select a number of assets using the option 'Select by Rectangle' or 'Select by Polygon', no assets are actually selected. Within the java console, you will see the following procedure being called:
select nm3sdo_gdo.insert_gdo_from_buffer
In SQL Plus, attempt to run this procedure and the following error will appear:
ORA-00904: IIT_NE_ID: invalid identifier
ORA-06512: at NM3SDO, line 9493
In order to resolve this issue, go to GIS themes (GIS0010) and query back the theme you are using in locator. Once the list appears, ensure the XXX_TAB theme has a valid entry in the PK Column and Label