Thank you Geoff and Helen but I think that I am not telling the story
well.

I have a form with a master detail relation. I haven't autocommit. When
I edit the detail I force the master to edit because the master afterpost
event does the transaction commitretaining, if the user cancel the master I
do a rollbackretainning. I have a problem, if I edit the master but no field
in the master is updated, IBO don't do the master afterpost and I think that
IBO would must to do.

Any idea? I hope that my second try will be better. My english is
limited.

Thank you.