How To Fix MD456 - The user settings for traffic lights have been deleted

MD456 - Overview

• Message type: E = Error

• Message class: MD - Material Requirements Planning (MRP)

• Message number: 456

• Message text: The user settings for traffic lights have been deleted

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD456 - The user settings for traffic lights have been deleted ?

  The SAP error message MD456, which states "The user settings for traffic lights have been deleted," typically occurs in the context of the SAP system's planning and reporting functionalities, particularly in the areas of Material Requirements Planning (MRP) or similar modules where traffic light indicators are used to visualize data.
  
  Cause:
  The error message MD456 indicates that the user-specific settings for the traffic light indicators have been removed or are not available. This can happen due to several reasons:
  
  User Profile Changes: Changes in user profiles or roles may lead to the loss of personalized settings.
  System Upgrades or Changes: Upgrading the SAP system or applying patches may reset user-specific settings.
  Data Corruption: Corruption in the user settings table or related configuration can lead to the deletion of these settings.
  Manual Deletion: Users or administrators may have manually deleted the settings.
  
  
  Solution:
  To resolve the MD456 error, you can try the following steps:
  
  
  Recreate User Settings:
  
  Navigate to the relevant