How To Fix ML066 - The list sequence must not contain any gaps

SAP Error Message - Details

• Message type: E = Error

• Message class: ML - Purchasing: Supplier Evaluation

• Message number: 066

• Message text: The list sequence must not contain any gaps

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message ML066 - The list sequence must not contain any gaps ?

  The SAP error message ML066, which states "The list sequence must not contain any gaps," typically occurs in the context of material management and inventory management processes. This error is related to the sequence of list numbers or document numbers that are expected to be continuous without any gaps.
  Cause:
  The error usually arises due to one of the following reasons:
  
  
  Missing Document Numbers: There may be missing document numbers in the sequence that the system expects. For example, if you have a sequence of document numbers from 1 to 10, but number 5 is missing, the system will throw this error.
  
  
  Incorrect Configuration: The configuration settings for number ranges in the relevant document type may not be set up correctly, leading to gaps in the expected sequence.
  
  
  Data Entry Errors: Manual data entry errors can lead to gaps in the sequence if documents are not created or posted correctly.
  
  
  Deletion of Documents: If documents were deleted or reversed, it could create gaps in the sequence.
  
  
  Solution:
  To resolve the ML066 error, you can take the following steps:
  
  
  Check Document Numbers: Review the list of document numbers in the relevant transaction or report to identify any missing numbers. You can do this by running a report that lists the document numbers in the sequence.
  
  
  Adjust Number Ranges: If the issue is related to number range configuration, you may need to adjust the number range settings in the SAP configuration. This can be done by accessing the relevant configuration transaction (e.g., OMR6 for material documents).
  
  
  Recreate Missing Documents: If specific documents are missing, you may need to recreate them or ensure that they are correctly posted in the system.
  
  
  Consult with SAP Support: If you are unable to identify the cause or resolve the issue, it may be beneficial to consult with SAP support or your internal SAP team for further assistance.
  
  
  Check for Deletions: Investigate if any documents were deleted or reversed that could have caused the gaps. If so, you may need to restore or recreate those documents.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB51 (Material Document List) or MB03 (Display Material Document) to help you analyze the document flow.
  Number Range Configuration: Understanding how to configure number ranges in SAP can help prevent this issue in the future. This can be done through the SPRO transaction.
  Documentation: Review SAP documentation or help files related to material management and document handling for more insights into managing document sequences.
  
  By following these steps, you should be able to identify and resolve the cause of the ML066 error in SAP.