SAP ABAP Message Class 5W Message Number 571 (The task cannot be deleted because some instances still exist.)
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 571  
Documentation status      
Authorization check Error Message      
Changed On    
Message Text
The task cannot be deleted because some instances still exist.
Help Document

Diagnosis

The task cannot be deleted because some instances still exist.

Procedure

First, archive any instances that are no longer needed (transaction

SARA or report RSWWARCA and RSWWARCD). Then try to delete the task again. If this message still appears, this means that some active instances still exist. In other words, you cannot delete this task at the present moment, since this would give rise to inconsistencies.

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