Multiple dynamic list boxes in module pool program

[former_member609989]

I have a module pool program with three list boxes. The first list box has a fixed drop down list. The second list box will have a drop down list which will be dynamically generated and which is dependent upon the value selected in the first list box. The third list box will have a drop down list which will be dynamically generated and which is dependent upon the value selected in the second list box. I can write the code to populate a list box bur for the life of me I cannot manage to get the second and third list box to populate dynamically because the values selected in those fields appear to go blank if I include the list box code in selection screen output. How do I get this to work? Thanks.

[SimoneMilesi]

Under which event you fill the lists for 2nd and 3rd dropdown?
How do you fill them?
You aren't sharing any kind of meaningful information (i.e. a snippet of your code) and I can only guess you put your code in the wrong place.

I suggest you to start from studying how module pool events work

[former_member609989]

This is where I am at now. I have implemented ON VALUE REQUEST FOR P_LB2 and ON VALUE REQUEST FOR P_LB3 associated with the second and third drop down lists. If I run the program the ON VALUE REQUEST FOR event fires for both the second and third drop down lists. If I select a value in P_LB1 (the first drop down list) the ON VALUE REQUEST FOR event fires for both the second and third drop down lists. At this time the drop down associated with P_LB2 is dynamically populated. If I click the drop down tied to the third list box no events fire. I'm very confuse by this behavior. I don't understand why the events stop firing at this point.

[former_member609989]

If i select a value in P_LB2 and hit enter the ON VALUE REQUEST FOR event fires for both the second and third drop down lists. At this time the selected value in P_LB2 goes blank and the drop down list associated with P_LB3 is not populated. I'm totally confused. In each event I use dynp_values_read to retrieve the value of the prior listbox and then use VRM_SET_VALUES. Is there another event I need to call to refresh the buffer or set values to the screen?