Hi Amaranatha,
Thank you so much, your solution works except it won't allow me use the multi-selection button on the right of F4 help for the selection-options field. I have to fill a value using F4 first, then I can use the multi-selection button. I should be able to use both F4 help and multi-selection button after I click the checkbox. Here is the screen shot shows the "Multiple selection" button, the one with an arrow pointing right, can't be used, I tried and I keep getting error msg. I should be able to use this button to fill the value as well:
