How To Fix /SAPAPO/CIF021 - Access block: data from system &1 updated again

/SAPAPO/CIF021 - Overview

• Message type: E = Error

• Message class: /SAPAPO/CIF -

• Message number: 021

• Message text: Access block: data from system &1 updated again

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 /SAPAPO/CIF021 - Access block: data from system &1 updated again ?

  The SAP error message /SAPAPO/CIF021 Access block: data from system &1 updated again typically occurs in the context of the SAP Advanced Planning and Optimization (APO) module, particularly when dealing with the Core Interface (CIF) between SAP ERP and SAP APO. This error indicates that there is a conflict in data updates between the two systems.
  
  Cause:
  The error is generally caused by one of the following reasons:
  
  Data Conflicts: The data being transferred from the ERP system to the APO system has been modified in the ERP system after it was initially sent to APO. This can happen if there are multiple updates happening simultaneously.
  Locking Mechanism: The CIF uses a locking mechanism to prevent data inconsistencies. If the data is locked in one system while an update is attempted from another, this error can occur.
  Timing Issues: If the data is being updated frequently, and the CIF job is trying to process the