The triggers only modify current record on update.  I’m not 100% sure it is the dependant tables that the indexed reads do read … but it seemed a semi-logical explanation since my update does a natural scan … if this weird behavior is only happening in my databases I will try to find some time to make a test database with minimum data so it could be reproduced by anyone …. Or I maybe will find what is wrong with my databases.

Thank you,

Evelyne