Have system-generated variables (e.g., interview__id, interview__key, interview__status) maintain data type even when all observations are empty. See the problem for
interview__key below, valid as for data Exported from Survey Solutions Headquarters 19.2.414 on Tuesday, February 12, 2019
Have contents of auxiliary files maintain data type even when all observations are empty (e.g interview__errors, interview__actions, interview__comments, interview__diagnostics). This needs to be confirmed.