SAP ABAP Message Class 1R Message Number 020 (&1 is not permitted as a derived category since it is a logical category)
Hierarchy
SAP_BASIS (Software Component) SAP Basis Component
   BC-SRV-KPR-DMS (Application Component) Document Management Services
     SDOK (Package) SAP Knowledge Provider
Attribute
Message class 1R  
Short Description SAP Knowledge Provider    
Message Number 020  
Documentation status       Space: object requires documentation
Authorization check Error Message      
Changed On 20130531   
Message Text
&1 is not permitted as a derived category since it is a logical category
Help Document

Diagnosis

You tried to use category as a derived category, but it is already being used as a logical category. A category cannot be both logical and derived.

System Response

This entry is not permitted.

Procedure

Correct your entry.

History
Last changed on/by 20130531  SAP 
SAP Release Created in