prob update cfindex with large query

Hi all,

I know i am using an old version standard MX 6.1 but ...
I work on windows 2000 server.
I have created 2 collections.
Then i have updated one of them with a query : 3600 records
That works fine.
Then i have updated the second with a query also but 15600 records.
<cfindex> return no err but nothing in the collection.
All collections less than 125000 docs.
Yesterday, this update may be with 15500 records have worked fine.
There is no problem disk space.

Any one have an idea?

Thanks.

Didier