How To Fix /SAPAPO/ATP039 - Communication error while reading data to system &1: &2&3

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 039

• Message text: Communication error while reading data to system &1: &2&3

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/ATP039 - Communication error while reading data to system &1: &2&3 ?

  The SAP error message /SAPAPO/ATP039 indicates a communication error while reading data from a system. This error typically occurs in the context of Advanced Planning and Optimization (APO) when there is an issue with the connection to the backend system or when data cannot be retrieved as expected.
  Causes:
  
  Network Issues: There may be network connectivity problems between the APO system and the backend system (e.g., SAP ERP).
  RFC Connection Problems: The Remote Function Call (RFC) connection might be misconfigured or down.
  Authorization Issues: The user may not have the necessary authorizations to access the data in the backend system.
  System Configuration: Incorrect settings in the APO system or the backend system can lead to communication errors.
  Data Locking: The data being accessed might be locked by another process, preventing the read operation.
  System Performance: High load on the system can lead to timeouts or failures in communication.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the systems. You can use tools like ping or traceroute to diagnose network issues.
  Verify RFC Connections: Go to transaction SM59 in the SAP GUI and check the status of the RFC connections. Test the connection to ensure it is working correctly.
  Review Authorizations: Ensure that the user has the necessary authorizations to access the required data in the backend system.
  Check System Configuration: Review the configuration settings in both the APO and backend systems to ensure they are set up correctly.
  Monitor System Performance: Check for any performance issues or high load on the system that might be causing timeouts. You can use transaction ST22 for dumps or SM21 for system logs.
  Data Locking: Investigate if the data is locked by another process. You can use transaction SM12 to check for locks and release them if necessary.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM59 (RFC Destinations), ST22 (Dump Analysis), SM21 (System Log), and SM12 (Lock Entries).
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  System Logs: Review system logs for any additional error messages or warnings that could provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.