How To Fix UPS173 - An ALE distribution packet number could not be assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: UPS - ALE Distribution Packet

• Message number: 173

• Message text: An ALE distribution packet number could not be assigned

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 UPS173 - An ALE distribution packet number could not be assigned ?

  The SAP error message UPS173, which states "An ALE distribution packet number could not be assigned," typically occurs in the context of Application Link Enabling (ALE) when there is an issue with the distribution of data between systems. This error can arise due to various reasons, and understanding the cause is essential for finding a solution.
  Causes:
  
  
  Number Range Issues: The most common cause of this error is that the number range for the ALE distribution packets has not been properly defined or is exhausted. Each distribution packet requires a unique number, and if the system cannot assign one, this error will occur.
  
  
  Configuration Issues: Incorrect configuration of the ALE settings or the distribution model can lead to this error. If the system is not set up correctly to handle the distribution of data, it may fail to generate the necessary packet numbers.
  
  
  System Performance: In some cases, performance issues or system locks can prevent the system from generating the packet number in a timely manner.
  
  
  Transport Layer Issues: If there are issues with the transport layer or if the system is unable to communicate with the relevant components, this error may arise.
  
  
  Solutions:
  
  
  Check Number Ranges:
  
  Go to transaction code SNRO (Number Range Objects).
  Look for the number range object related to ALE distribution packets (usually ALE or similar).
  Ensure that the number range is defined correctly and that there are available numbers. If necessary, extend the number range.
  
  
  
  Review ALE Configuration:
  
  Use transaction code WE20 to check the partner profiles and ensure that they are configured correctly.
  Verify the distribution model using transaction code BD64 to ensure that the necessary settings are in place.
  
  
  
  System Performance:
  
  Check for any performance issues or locks in the system that might be affecting the generation of packet numbers. You can use transaction code SM12 to check for locks and SM37 to review job logs.
  
  
  
  Transport Layer:
  
  Ensure that the transport layer is functioning correctly and that there are no communication issues between the systems involved in the ALE distribution.
  
  
  
  Check Logs:
  
  Review the application logs for any additional error messages or warnings that might provide more context about the issue. You can use transaction code SLG1 to view application logs.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that might address this specific error. There may be patches or updates that resolve known issues related to ALE distribution.
  
  
  
  Related Information:
  
  ALE Overview: ALE is a technology used in SAP for data distribution between different systems. Understanding how ALE works can help in troubleshooting issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as WE20 (Partner Profiles), BD64 (Distribution Model), SNRO (Number Ranges), and SLG1 (Application Logs).
  SAP Community: Engaging with the SAP Community can provide insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the UPS173 error and implement a solution to resolve it.