How To Fix WRF_REF420 - Inheritance excludes parallel processing!

WRF_REF420 - Overview

• Message type: E = Error

• Message class: WRF_REF - Messages from References for Materials Without History

• Message number: 420

• Message text: Inheritance excludes parallel processing!

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_REF420 - Inheritance excludes parallel processing! ?

  The SAP error message WRF_REF420 ("Inheritance excludes parallel processing") typically occurs in the context of SAP's Advanced Planning and Optimization (APO) module, particularly when dealing with the inheritance of characteristics in planning scenarios. This error indicates that there is a conflict between the settings for parallel processing and the inheritance of certain characteristics.
  
  Cause:
  The error arises when you attempt to execute a planning run that involves characteristics that are set to be inherited, but the system is configured to use parallel processing. Inheritance in this context means that certain characteristics or values are derived from a higher level in the hierarchy, and this process cannot be executed in parallel due to the dependencies involved.
  
  Solution:
  To resolve the WRF_REF420 error, you can consider the following approaches:
  
  
  Disable Parallel Processing:
  
  If the planning run does not require parallel processing, you can disable it. This can usually be done in the planning run settings or job configuration.
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