Now that I think.... it was happening with local tables, nothing special, just updates or replaces like:

"REPLACE ALL xxxx WITH 'xxxx' FOR yyyyyyyy = 'zzzzzz'

or

"UPDATE fffff SET xxxx = 'xxxx' WHERE yyyyyyyy = 'zzzzzz'"

The first time I did, i was moderated slow, the second ( and third,4th....etc.) time I was soooo fast, but when I ussue a close data or a use, the system died!!!

It wasn't matter which of the sentences used (UPDATE or REPLACE).

Thanks
Humberto