How To Fix MC991 - Initialization error with log flag in table DDNTT

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 991

• Message text: Initialization error with log flag in table DDNTT

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MC991 - Initialization error with log flag in table DDNTT ?

  The SAP error message MC991, which indicates an "Initialization error with log flag in table DDNTT," typically occurs during the execution of certain transactions or reports in the SAP system, particularly those related to inventory management or material management.
  Cause:
  The error is often caused by issues related to the internal table DDNTT, which is used for temporary storage of data during report execution. Common causes include:
  
  Data Corruption: The DDNTT table may have corrupted entries or inconsistencies.
  Memory Issues: Insufficient memory allocation for the process can lead to initialization errors.
  Configuration Issues: Incorrect settings or configurations in the SAP system can lead to this error.
  Program Errors: Bugs or issues in the ABAP program that is being executed can also trigger this error.
  
  Solution:
  To resolve the MC991 error, you can try the following steps:
  
  
  Check for Data Consistency:
  
  Use transaction codes like SE11 or SE16 to check the contents of the DDNTT table for any inconsistencies or corruption.
  
  
  
  Clear Buffer:
  
  Sometimes, clearing the buffer can help. You can do this by using transaction code SM12 to delete any locked entries that might be causing the issue.
  
  
  
  Increase Memory Allocation:
  
  If the error is related to memory, consider increasing the memory allocation for the SAP instance. This can be done in the instance profile settings.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date with the latest patches and updates. Sometimes, SAP releases notes or patches that address specific issues.
  
  
  
  Review ABAP Code:
  
  If you have access to the ABAP code that is causing the error, review it for any potential issues or bugs. Debugging the program may help identify the root cause.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. You can search for "MC991" or related keywords.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including any logs or screenshots.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE16 (Data Browser), SM12 (Lock Entries), and ST22 (Dump Analysis) for troubleshooting.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Documentation: Review SAP documentation related to inventory management and the specific transactions you are working with to understand any prerequisites or configurations that may be necessary.
  
  By following these steps, you should be able to diagnose and resolve the MC991 error in your SAP system.