what can i count colums of ndbcluster? (no replies)

I set MaxNoOfAttributes=10000 in config.ini.

Currently in mysql cluster, columns of ndbcluster engine exist 7642.

select count(*) from information_schema.columns c, information_schema.tables t
where c.table_schema = t.table_schema and c.table_name = t.table_name and t.engine='ndbcluster';
--
7642

This values is low than MaxNoOfAttributes=10000.
but I can't create new table.

ERROR 1005 (HY000): Can't create table 'test.t1' (errno: 708)

It may be that cause extra blob table existence.

What can I count real exist column in internal ndbcluster?