How To Fix MD309 - Program error: internal table & is inconsistent

SAP Error Message - Details

• Message type: E = Error

• Message class: MD - Material Requirements Planning (MRP)

• Message number: 309

• Message text: Program error: internal table & is inconsistent

What causes this issue?

An error has occurred in the program.

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?

Please take note of the exact procedure and contact the SAP Hotline.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD309 - Program error: internal table & is inconsistent ?

  The SAP error message MD309, which states "Program error: internal table & is inconsistent," typically indicates that there is an issue with the internal data structures used by the SAP system during the execution of a program or transaction. This error can occur in various contexts, often related to Material Requirements Planning (MRP) or other related modules.
  Causes:
  
  Data Corruption: The internal table may have become corrupted due to a previous error or inconsistency in the data.
  Custom Code: If there are custom enhancements or modifications in the program, they may not be handling data correctly, leading to inconsistencies.
  System Bugs: There may be a bug in the SAP program or transaction that is causing the internal table to be populated incorrectly.
  Configuration Issues: Incorrect configuration settings in the MRP or related modules can lead to unexpected behavior and errors.
  Concurrency Issues: If multiple users or processes are trying to access or modify the same data simultaneously, it can lead to inconsistencies.
  
  Solutions:
  
  Check for Notes and Patches: Look for SAP Notes related to the specific transaction or program that is generating the error. SAP may have released patches or updates to address known issues.
  Debugging: If you have access to the ABAP debugger, you can analyze the program to identify where the internal table is being populated and what might be causing the inconsistency.
  Review Custom Code: If there are any custom enhancements, review the code to ensure that it is correctly handling data and not causing inconsistencies.
  Data Consistency Check: Run consistency checks for the relevant data (e.g., material master, MRP data) to identify and correct any inconsistencies.
  Transaction Logs: Check transaction logs for any recent changes that might have led to the error. This can help identify if a specific action triggered the issue.
  Contact SAP Support: If the issue persists and you cannot resolve it, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including transaction codes, steps to reproduce, and any relevant logs.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in diagnosing the issue, such as MD04 (Stock/Requirements List) or MD05 (MRP List).
  SAP Notes: Regularly check the SAP Support Portal for notes related to MRP and the specific program or transaction you are working with.
  System Logs: Use transaction SLG1 to check application logs for any related messages that might provide additional context for the error.
  
  By following these steps, you should be able to identify the cause of the MD309 error and take appropriate action to resolve it.