How To Fix MCEX166 - Update mode changed from serialized V3 update -> Long text

MCEX166 - Overview

• Message type: E = Error

• Message class: MCEX - Extraction Interface LIS/BW

• Message number: 166

• Message text: Update mode changed from serialized V3 update -> Long text

What causes this issue?

You have changed the update mode to "Serialized V3 Update".
Note that this mode will no longer be available in future plug-in
releases.
Furthermore, you need to keep in mind that this mode can cause
performance problems. These problems can occur especially if you
create/change documents in the OLTP system in different languages.

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?

Check to see if you can use the update modes "Delta Direct" or "Delta
Queued" for application &V1&.
<ZH>Important</>:
Before transporting the customizing requests for changing the update
mode in other systems, you <ZH>must</> check to see that no more
entries in this system are in the queue MCEX&V1&. It is possible to
check the target system in the logistics queue overview (transaction
LBWQ).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MCEX166 - Update mode changed from serialized V3 update -> Long text ?

  The SAP error message MCEX166 indicates that the update mode for a particular process has changed from a serialized V3 update to a different mode. This typically occurs in the context of the SAP system's update processing, particularly when dealing with data updates in the background.
  
  Cause:
  
  
  Update Mode Change: The error suggests that the system has detected a change in the update mode. This can happen due to various reasons, such as:
  
  Configuration changes in the update settings.
  Issues with the update framework or the way updates are being processed.
  A specific transaction or program that is not compatible with the serialized V3 update mode.
  
  
  
  Data Consistency Issues: If there are inconsistencies in the data being processed, the system may switch to a different update mode to handle the situation.
  
  
  Performance Considerations: Sometimes, the system may automatically switch modes to optimize performance or to avoid deadlocks.
  
  
  
  Solution:
  
  
  Check Update Configuration: Review the update configuration settings in the SAP