I've just discovered that, contrary to previous Ha and before release, if you have a join and explicitly set the UpdateSQL, in Hc the dataset seems read only. This showed up in a program to which I changed only IBO version and code to access Win2000 registry, so I'm pretty sure that is a IBO problem.
If you provide KeyRelation and delete the UpdateSQL, the query works good (of course, if can manage the update by itself, that is not very often, unfortunatly).
Can anyone confirm this?

Thanks
Marco Menardi