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How To Fix >2636 - A unique key could not be generated for the contra record


SAP Error Message - Details

  • Message type: E = Error

  • Message class: >2 -

  • Message number: 636

  • Message text: A unique key could not be generated for the contra record

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  • 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 >2636 - A unique key could not be generated for the contra record ?

    The SAP error message "2636 A unique key could not be generated for the contra record" typically occurs in the context of financial transactions, particularly when dealing with accounting documents or postings. This error indicates that the system is unable to create a unique identifier for a record that is supposed to be linked to another record, often due to issues with the data being processed.

    Causes:

    1. Duplicate Entries: The most common cause is that there are duplicate entries in the database that violate the uniqueness constraint for the key fields.
    2. Missing Data: Required fields that are necessary for generating a unique key may be missing or incorrectly filled.
    3. Configuration Issues: There may be issues with the configuration of the document types or number ranges in the system.
    4. Data Consistency Issues: Inconsistencies in the data, such as incorrect or incomplete master data, can lead to this error.
    5. Custom Code: If there are custom enhancements or modifications in the system, they might interfere with the standard key generation process.

    Solutions:

    1. Check for Duplicates: Review the entries in the relevant tables to ensure there are no duplicate records that could be causing the conflict.
    2. Validate Data: Ensure that all required fields are filled out correctly and that there are no missing values that are necessary for the key generation.
    3. Review Configuration: Check the configuration settings for document types and number ranges to ensure they are set up correctly.
    4. Data Consistency Check: Run consistency checks on the relevant master data to ensure that all necessary data is present and correct.
    5. Debugging Custom Code: If there are custom enhancements, review the code to ensure it is not interfering with the standard processes.
    6. Consult SAP Notes: Check the SAP Support Portal for any relevant notes or patches that may address this specific error.

    Related Information:

    • Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), or SE80 (Object Navigator) to investigate the underlying tables and data.
    • SAP Support: If the issue persists, consider reaching out to SAP support for assistance, providing them with detailed information about the error and the context in which it occurs.
    • Documentation: Review SAP documentation related to the specific module you are working with (e.g., FI, CO) for additional insights into key generation processes.

    By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.

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