How To Fix NGC_RAP055 - Characteristic position number is read-only

SAP Error Message - Details

• Message type: E = Error

• Message class: NGC_RAP - Message class for NGC RAP Implementations

• Message number: 055

• Message text: Characteristic position number is read-only

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 NGC_RAP055 - Characteristic position number is read-only ?

  The SAP error message NGC_RAP055, which states "Characteristic position number is read-only," typically occurs in the context of SAP's Advanced Planning and Optimization (APO) or similar modules where characteristics and their positions are managed. This error indicates that the system is trying to modify a characteristic position number that is not allowed to be changed due to its read-only status.
  Cause:
  
  
  Read-Only Status: The characteristic position number is set to read-only in the system, meaning it cannot be modified. This can happen due to various reasons, such as:
  
  The characteristic is part of a master data object that is locked or in a state that does not allow changes.
  The characteristic is being used in a context (like a planning run or a report) where modifications are not permitted.
  The characteristic is defined in a way that restricts changes (e.g., it may be derived from a configuration or a specific setting in the system).
  
  
  
  Data Integrity Rules: SAP enforces data integrity rules that prevent changes to certain fields if they would violate the integrity of the data model.
  
  
  Solution:
  
  
  Check the Status: Verify the status of the characteristic position number. Ensure that it is not locked or in a state that prevents changes. You may need to check the relevant master data or configuration settings.
  
  
  Review Configuration: Look into the configuration settings for the characteristic. If it is defined as read-only, you may need to adjust the settings or create a new characteristic that allows for changes.
  
  
  Use Appropriate Transactions: Ensure that you are using the correct transaction or process to make changes. Some transactions may have restrictions on what can be modified.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on modifying characteristics and their positions. This can provide insights into any restrictions or best practices.
  
  
  Contact Support: If the issue persists and you cannot determine the cause, consider reaching out to SAP support or your internal SAP team for assistance. They may have additional tools or insights to help resolve the issue.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to the characteristic position numbers.
  System Logs: Review system logs for any additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.