How To Fix UPS266 - &1 messages were not yet passed to the target system

UPS266 - Overview

• Message type: E = Error

• Message class: UPS - ALE Distribution Packet

• Message number: 266

• Message text: &1 messages were not yet passed to the target system

What causes this issue?

Object IDocs have been transferred to the transport layer (ALE) using
the "Send" function.
&V1& IDocs are still in the transport layer in outbound processing and
have not been transferred to the target system.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Use the "Process IDocs" function to trigger the transferral of the
IDocs to the target system.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UPS266 - &1 messages were not yet passed to the target system ?

  The SAP error message UPS266 indicates that a certain number of messages (denoted by &1) have not yet been passed to the target system. This error typically occurs in the context of the SAP system's message processing, particularly when dealing with the SAP Process Integration (PI) or Process Orchestration (PO) components.
  
  Cause:
  
  Message Queue Issues: The messages may be stuck in the queue due to various reasons, such as network issues, configuration problems, or system performance issues.
  Configuration Errors: Incorrect configuration of the communication channels or the integration scenario can lead to messages not being processed.
  System Performance: High load on the system can cause delays in message processing, leading to messages not being sent to the target system in a timely manner.
  Error in the Target System: If the target system is down or experiencing issues, messages may not be able to be sent.
  
  
  Solution:
  
  Check Message Queue: Use transaction codes like SXMB_MONI or SXI_MONI to