How To Fix M8404 - System error when accessing purchase order &

SAP Error Message - Details

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 404

• Message text: System error when accessing purchase order &

What causes this issue?

An error was found when the system tried to access the purchase
order. The error was due to one of the following reasons:
- the purchase order has been deleted
- the order category is wrong
- the purchase order does not exist.

System Response

The system terminates the PO selection process.

How to fix this error?

In all of the above cases, you should inform your systems
administrator. The error may be due to wrong or incomplete matchcodes
(M_MEKKD). In this case, the matchcodes should be restructured.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M8404 - System error when accessing purchase order & ?

  The SAP error message M8404, which indicates a "System error when accessing purchase order," typically arises due to issues related to data inconsistencies, system configuration, or temporary system problems. Here are some potential causes, solutions, and related information for this error:
  Causes:
  
  Data Inconsistencies: There may be inconsistencies in the database related to the purchase order, such as missing or corrupted data.
  Authorization Issues: The user may not have the necessary authorizations to access the purchase order.
  System Configuration: Incorrect configuration settings in the SAP system can lead to errors when trying to access certain transactions.
  Temporary System Issues: Sometimes, the error can be due to temporary issues with the SAP system, such as performance problems or system downtime.
  Database Issues: Problems with the underlying database, such as locks or corruption, can also lead to this error.
  
  Solutions:
  
  
  Check Data Consistency:
  
  Use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to check the relevant tables for inconsistencies.
  Run consistency checks if available.
  
  
  
  Review Authorizations:
  
  Ensure that the user has the necessary authorizations to access the purchase order. This can be checked using transaction SU53 (Authorization Check) after the error occurs.
  
  
  
  Check System Configuration:
  
  Review the configuration settings related to purchasing and ensure they are set up correctly.
  Consult with your SAP Basis team to verify that the system is configured properly.
  
  
  
  Restart the Session:
  
  Sometimes, simply logging out and logging back into the SAP system can resolve temporary issues.
  
  
  
  Check System Logs:
  
  Use transaction codes SM21 (System Log) and ST22 (Dump Analysis) to check for any system logs or dumps that might provide more information about the error.
  
  
  
  Contact SAP Support:
  
  If the issue persists, consider reaching out to SAP support for assistance. Provide them with the error message details and any relevant logs.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ME23N (Display Purchase Order) and ME22N (Change Purchase Order) to troubleshoot further.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify the cause of the M8404 error and implement a suitable solution.