How To Fix TRM_ESOA028 - Exactly-once request cannot be locked: &1 (error code: &2)

TRM_ESOA028 - Overview

• Message type: E = Error

• Message class: TRM_ESOA - Message Class for Tax and Revenue Management Services

• Message number: 028

• Message text: Exactly-once request cannot be locked: &1 (error code: &2)

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message TRM_ESOA028 - Exactly-once request cannot be locked: &1 (error code: &2) ?

  The SAP error message TRM_ESOA028, which states "Exactly-once request cannot be locked: &1 (error code: &2)," typically occurs in the context of SAP Process Integration (PI) or SAP Process Orchestration (PO) when there is an issue with the locking mechanism for exactly-once processing of messages. This error indicates that the system is unable to lock a specific request for processing, which is essential for ensuring that messages are processed exactly once without duplication.
  Causes:
  
  Concurrency Issues: The error may arise when multiple processes attempt to access the same request simultaneously, leading to a conflict in locking.
  Database Locking: The underlying database may have locks that prevent the request from being locked for processing.
  
  Configuration Issues: Incorrect configuration settings in the SAP PI/PO system can lead to locking problems.
  System Performance: High system load or performance issues can lead to timeouts or failures in acquiring locks.
  Message Processing Errors: If a previous message processing attempt failed, it