Might be cache issue!
should I clean out the server session and caches? or my machine?
The thing is that.. it shouldn't be disappear..cause I have the data in result section..
did u check after cache purge?
if you are missing after cache purge can you check the total number of vlaues for the atribute in table. check your row limit of configuratin for maximum visible rows. configuration might be the reason or try by SQL results in prompt choice list values.
Ok.. guys.. I found the reason why. I check the physical model. and one of column has primary key.
I don't know how it got it as a primary key. I removed the key and refresh it. There was a missing data re-appear.