How To Fix UPS181 - Inbound ALE distribution packets must include message numbers

UPS181 - Overview

• Message type: E = Error

• Message class: UPS - ALE Distribution Packet

• Message number: 181

• Message text: Inbound ALE distribution packets must include message numbers

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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UPS181 - Details

• The SAP error message UPS181 indicates that there is an issue with the inbound Application Link Enabling (ALE) distribution packets. Specifically, it states that the packets must include message numbers, which are essential for the proper processing of the data being transferred between systems.
  
  Cause:
  The error typically arises due to one of the following reasons:
  
  
  Missing Message Numbers: The inbound ALE distribution packets do not contain the required message numbers. This can happen if the sending system did not include the message numbers in the outbound ALE IDoc or if there was an issue during the transmission.
  
  
  
  Configuration Issues: There may be configuration issues in the ALE settings, such as incorrect settings for the logical systems or message types.
  
  
  IDoc Structure: The structure of the IDoc being sent may not conform to the expected format, leading to missing fields, including message numbers.
  
  
  Version Mismatch: There could be a version mismatch between the systems involved, where