How To Fix WRF_PPW819 - Change of mat. &1 not possible; only postprocessed items can be changed

WRF_PPW819 - Overview

• Message type: E = Error

• Message class: WRF_PPW - Price Planning Workbench

• Message number: 819

• Message text: Change of mat. &1 not possible; only postprocessed items can be changed

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_PPW819 - Change of mat. &1 not possible; only postprocessed items can be changed ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WRF_PPW819 Change of mat. &1 not possible; only postprocessed items can be changed
  
  Meaning / 
  Cause:
  This error occurs when you try to change a material in a document or process where the system only allows changes to items that have already been post-processed. In other words, the material you are attempting to change is not in a status that permits modification because it has not yet been post-processed or finalized.
  
  Material &1 refers to the material number you are trying to change.
  The system restricts changes to only those items that have been post-processed (e.g., after certain workflow steps, postings, or status changes).
  Attempting to change a material before it reaches this stage triggers this error.
  
  This is common in processes like production orders, goods movements, or workflow-driven documents where certain steps must be completed before changes are allowed.
  
  Typical Scenarios:
  
  Changing materials in a production