How To Fix /SAPAPO/SDP128 - In display mode you are not allowed to enter any values

/SAPAPO/SDP128 - Overview

• Message type: E = Error

• Message class: /SAPAPO/SDP -

• Message number: 128

• Message text: In display mode you are not allowed to enter any values

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.

Unfortunately, there isn't any extra information in this error notice.

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/SAPAPO/SDP128 - Details

• The SAP error message /SAPAPO/SDP128 typically occurs in the context of SAP Advanced Planning and Optimization (APO), particularly when working with the Supply Network Planning (SNP) or Demand Planning (DP) modules. The message indicates that you are trying to enter or modify values in a display mode where such actions are not permitted.
  
  Cause:
  The error is caused by attempting to make changes to data while in a display-only mode. This can happen in various scenarios, such as:
  
  You are viewing a planning book or a data view that is set to display mode.
  The user authorization settings restrict editing capabilities.
  The planning book or data view is configured to be read-only.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Switch to Change Mode:
  
  If you are in a planning book or data view, check if there is an option to switch from display mode to change mode. This is usually done through a menu option