How To Fix POAC026 - The entry &1 is not in customer namespace (Z*, Y*)

SAP Error Message - Details

• Message type: E = Error

• Message class: POAC - Accruals for Purchase Orders

• Message number: 026

• Message text: The entry &1 is not in customer namespace (Z*, Y*)

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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Smart SAP Assistant

• What is the cause and solution for SAP error message POAC026 - The entry &1 is not in customer namespace (Z*, Y*) ?

  The SAP error message POAC026 indicates that there is an issue with the namespace of an object you are trying to access or use. Specifically, it means that the entry you are trying to reference is not in the customer namespace, which typically includes namespaces starting with "Z" or "Y". This error often occurs in the context of custom developments or enhancements in SAP.
  Cause:
  
  Incorrect Namespace: The object (like a program, function module, or class) you are trying to access is not defined in the customer namespace (Z or Y). It might be in the standard SAP namespace or another namespace that is not allowed for customer developments.
  Missing Object: The object you are trying to reference may not exist at all, or it may have been deleted or not transported correctly.
  Authorization Issues: You may not have the necessary authorizations to access the object in question.
  
  Solution:
  
  Check Object Existence: Verify that the object you are trying to access actually exists in the system. You can do this by using transaction codes like SE80 (Object Navigator) or SE11 (Data Dictionary).
  Correct Namespace: If you are developing a new object, ensure that you are using the correct customer namespace (Z or Y). If you are trying to access a standard SAP object, make sure you are using the correct name and that it is not mistakenly prefixed with Z or Y.
  Transport Issues: If the object is supposed to be in the customer namespace but is missing, check the transport requests to ensure that the object was transported correctly to the target system.
  Authorization Check: Ensure that you have the necessary authorizations to access the object. You may need to contact your SAP security team to verify your roles and permissions.
  Debugging: If you are still facing issues, consider debugging the program or transaction that is generating the error to identify the exact point of failure.
  
  Related Information:
  
  Namespaces in SAP: In SAP, namespaces are used to differentiate between standard SAP objects and customer-specific objects. Standard objects are typically in the SAP namespace, while customer-specific objects should be in the Z or Y namespace.
  Transport Management: Understanding how transport requests work in SAP can help you manage and troubleshoot issues related to missing objects.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional context.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.