>>>>>>>How can you have a container with a different DS than form's DS? What type of a container it is?
>>>>>>Each container gets data session object.
>>>>>
>>>>>Do you mean you add DS object programmatically in container's Init? Or how exactly do you do it? Can you please explain it in a little bit more details?
>>>>>
>>>>>Thanks.
>>>>Yes, in Init I am adding Session object to each container.
>>>
>>>It is extremely cumbersome arrangement, but still it has nothing to do with combobox problem, correct? Basically, what you expect to happen when user makes another combobox selection?
>>I am checking InterativeChange that combo's ControlSource is not updated or gets updated with some kind of delay.
>
>InteractiveChange may be a problem. You may need to add something like
>this.value = this.value to force it to work.

this.value = this.value ?

If THIS.VALUE is not equal to itself already, what can it be equal to? :-)