How To Fix MCEX184 - Error while reading tables TMCEXACT and TMCEXUPD

SAP Error Message - Details

• Message type: E = Error

• Message class: MCEX - Extraction Interface LIS/BW

• Message number: 184

• Message text: Error while reading tables TMCEXACT and TMCEXUPD

What causes this issue?

There was a problem reading the tables TMCEXUPD and TMCEXACT.

System Response

The system now adopts posting mode &V2& for the logistic application
&V1&.

How to fix this error?

Check the contents of the above tables (for example, comparison
with another system) as well as the database consistency.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MCEX184 - Error while reading tables TMCEXACT and TMCEXUPD ?

  The SAP error message MCEX184, which states "Error while reading tables TMCEXACT and TMCEXUPD," typically occurs in the context of the SAP Material Management (MM) module, particularly when dealing with the Material Ledger or related functionalities. This error indicates that there is an issue with reading the specified database tables, which can be caused by several factors.
  Causes:
  
  Database Issues: The tables TMCEXACT and TMCEXUPD may be corrupted or not properly updated. This can happen due to database inconsistencies or issues during data migration.
  Authorization Problems: The user may not have the necessary authorizations to access these tables.
  Configuration Issues: Incorrect configuration settings in the Material Ledger or related modules can lead to this error.
  Transport Issues: If there were recent transports that included changes to these tables or related configurations, they may not have been executed correctly.
  System Performance: If the system is under heavy load, it may lead to timeouts or failures in reading the tables.
  
  Solutions:
  
  Check Database Integrity: Use transaction codes like SE14 (Database Utility) to check the integrity of the tables. If there are inconsistencies, you may need to repair them.
  Review Authorizations: Ensure that the user encountering the error has the necessary authorizations to access the tables. You can check this using transaction SU53 or by reviewing the user's roles and authorizations.
  Configuration Review: Verify the configuration settings related to the Material Ledger and ensure they are set up correctly. This can be done through transaction SPRO.
  Transport Management: If the issue arose after a transport, check the transport logs for errors and ensure that all necessary objects were transported correctly.
  System Performance: Monitor system performance and check for any locks or long-running processes that may be affecting database access. You can use transaction SM50 or SM66 to monitor active processes.
  Consult SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error. There may be patches or updates available that resolve the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), and SPRO (Customizing).
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including any relevant logs or screenshots.
  Documentation: Review SAP documentation related to the Material Ledger and the specific tables involved for additional context and troubleshooting steps.
  
  By following these steps, you should be able to diagnose and resolve the MCEX184 error effectively.