Database Software

I tried to run the sdo_util.getvertices on a simple table of points.

Here is the sql and the error:

SQL> select c.city_name, t.x, t.y
2 from cities c, table(SDO_UTIL.GETVERTICES (c.geometry)) t;
from cities c, table(SDO_UTIL.GETVERTICES(c.geometry)) t
*
ERROR at line 2:
ORA-06533: Subscript beyond count
ORA-06512: at "MDSYS.SDO_UTIL", line 61

What could cause this problem?

Thanks,

JDE