clustering problem

I'm running ODS 7.23 on an IBM SP FRAME running AIX 4.1. I am trying to create a cluster index on a table that contains a column which will hold an image. The blob will be stored in a blobspace as opposed of being stored in the TBLspace. The definition of the table is like Create table T1 ( col1_pk serial not null, col2_int integer not null, col3_date date, col4_blob byte in blobsp1, col5_datetime datetime, ) in dbs1; Where blobsp1 is a blob space of 1 page blobs (4K for AIX). There is amble space in dbs1 and blobsp1 ( 10x more than what is currently used / allocated). Both dbs1 and blobsp1 are used by only one table, T1. When I try to create a cluster index with the following stmt: Create Cluster Index on T1 (col1_pk, col2_int) in dbs1; I get an error 502 (not enough space to create cluster index) when I execute this stmt in dbaccess. Where am I running out of space? /tmp still has about 20 MB free. The table contains about 300 rows. My tempdbspace is comprised of a series of eight 8 MB temp dbspaces. When I drop the blob column (blob4_blob), I can create the index. When I delete all the rows from T1, I can create the index. But when there is data, I cannot successfully create a cluster index. Even when I set the blob column (col4_blob) to null, I still get the same error. Is there a limitation on creating a cluster index on a table with a column defined as BYTE? Your help is appreciated. Steve. skwong@wcb.bc.ca