We were having the same issues where the list box wouldn't populate. I opened an incident with Infor and received the information below. Now my listboxes populate!
With the new version of Design Studio (10.0.5 and greater) there are new API methods lawformAddListboxOption and lawformRemoveListboxOption to dynamically add or remove options from listboxes. This information is to replace the manual process referenced in KB 1619046 that is to be used prior to 10.0.5. The lawformAddListboxOption function accepts three or four arguments. The required arguments are listbox id, transaction value, and display value. If the listbox is in a detail area, the row number should be passed as the fourth option. Example for a normal listbox: lawformAddListboxOption('_f617', 'Z', 'Another option'); Example for a listbox in a detail area on row 1: lawformAddListboxOption('_f484r0', 'Z', 'Another option', '1'); The lawformRemoveListboxOption function accepts two or three arguments. The required arguments are listbox id, and transaction value. If the listbox is in a detail area, the row number should be passed as the third option. Example for a normal listbox: lawformRemoveListboxOption('_f617', 'Z'); Example for a listbox in a detail area on row 1: lawformRemoveListboxOption('_f484r0', 'Z', '1');