How To Fix /SAPAPO/OO_REL043 - '_' not allowed as first character in name &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/OO_REL -

• Message number: 043

• Message text: '_' not allowed as first character in name &1

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 /SAPAPO/OO_REL043 - '_' not allowed as first character in name &1 ?

  The SAP error message /SAPAPO/OO_REL043 '_' not allowed as first character in name &1 typically occurs in the context of SAP Advanced Planning and Optimization (APO) when you are trying to create or modify an object (like a planning book, data view, or other entities) and the name you have provided starts with an underscore (_). In SAP, certain naming conventions restrict the use of specific characters at the beginning of object names.
  Cause:
  The error is caused by the naming convention rules in SAP, which do not allow the underscore character (_) to be the first character in the name of certain objects. This is a validation rule to ensure that object names are compliant with SAP's naming standards.
  Solution:
  To resolve this error, you should rename the object you are trying to create or modify. Here are the steps you can follow:
  
  
  Identify the Object: Determine which object you are trying to create or modify that is causing the error. The error message will typically indicate the name of the object in place of &1.
  
  
  Rename the Object: Change the name of the object so that it does not start with an underscore. For example, if the original name was _MyObject, you could rename it to MyObject or A_MyObject.
  
  
  Check Naming Conventions: Ensure that the new name adheres to SAP's naming conventions. Generally, object names should start with a letter (A-Z, a-z) and can include numbers and certain special characters thereafter.
  
  
  Retry the Operation: After renaming the object, attempt to create or modify it again.
  
  
  Related Information:
  
  SAP Documentation: Refer to the SAP documentation for specific naming conventions related to the type of object you are working with. Different objects may have different rules.
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or updates regarding naming conventions and error handling.
  Community Forums: If you continue to experience issues, consider reaching out to SAP community forums or support for further assistance.
  
  By following these steps, you should be able to resolve the error and successfully create or modify the object in SAP APO.