I have some old application on IBX which I want port it into IBO. But
before doing it I want to know if the following problem/inconsistency
occur in IBO. Because in IBX they occur without knowing why?

in IBX I encountered that sometimes when iam going to save all the
newly added record including the master and the detail dataset,
sometimes not all records in detail dataset are inserted? they
disappear... and when editing all of the edited detailed table have
save ...

in my old detail table I dont have a unique key or field which i
think is my past error. So what happen is when iam saving ... I order
of the detail dataset was rearrange after saving...

these where the problem I encountered in IBX. anyone ever encounter
this on IBO?

if were going to save a record, which should be save first? master or
detail? should they be commited right way? before saving the other
one?

thanks