One ViewObject with multiple Entities -- killing me

Guys.....
Any thought why postChanges is not being called on a View object with Multiple Entities........
When i click on createinsert button and then save......(without making any changes to VO fields)...... no records are being saved and thus postChanges is not being called.....
anything I can do to fix it.....
-R

Timo and Biag
Thank you for your response....
You have a good point but still i would love need to implement a validation that if all columns are empty; prompt an error message.... kind of a thing.....
Entity.setNewRowState(Row.new) doesn't mark this row as new row...... what is the best way to force the new record event from VO?
may be will implement something before Commiting on that page.....

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