WBS elements have earlier start date than project definition
Message type: E = Error
Message class: CJ - Project master data and structure
Message number: 587
Message text: WBS elements have earlier start date than project definition
What causes this issue?
You entered a start date for the WBS element that is before the start
date in the project definition. Since the start and finish dates in the
project definition are not binding, processing has not been stopped.
Error message extract from SAP system. Copyright SAP SE.