SAP ABAP Message Class 5W Message Number 570 (The task cannot be deleted since it is still used in WF definitions.)
Hierarchy
SAP_BASIS (Software Component) SAP Basis Component
   BC-BMT-OM (Application Component) Organizational Management
     SP00 (Package) Organization and Planning
Attribute
Message class 5W  
Short Description Messages for PD (Particularly Workflow)    
Message Number 570  
Documentation status      
Authorization check Error Message      
Changed On    
Message Text
The task cannot be deleted since it is still used in WF definitions.
Help Document

Diagnosis

The task (single step, multiple step) cannot be deleted because it is

still used in at least one workflow definition.

History
Last changed on/by 20141121  SAP 
SAP Release Created in