multi level nested table

[iuanee]

hi, i am trying to create a multi-level nested table with the following schema..

create type typeA(
...
...
)

create type typeA_ntabtyp as table of typeA;

create type typeB(
...
a typeA_ntabtyp;
)

create type typeB_ntabtyp as table of typeB;


create type typeC(
...
b typeB_ntabtyp;
)

all of the above works fine

but when i create a table of typeC, it gives me an error:

create table tableC of typeC
NESTED TABLE a STORE AS a_ntab(
NESTED TABLE b STORE AS b_ntab
);

ERROR at line 1:
ORA-22913: must specify table name for nested table column or attribute

i've already provided a, b and their table name as shown above....

anyone know the correct way of doing it??

thanks,

iuanee