SAP Message AP078 - Entering a WBS element does not make sense for several projects

Diagnosis You have selected several projects and also entered a WBS element inthe initial screen. It only makes sense to enter a WBS element in theinitial screen when you have selected only one project. Procedure Please select only one project, and enter a WBS element in the initialscreen that is within this project. Or else remove the entry of theWBS element in the initial screen.