How To Fix CNVMBT071 - Too many tables with decimal fields, please choose generic key

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBT - Messages for MBT/API/PCL

• Message number: 071

• Message text: Too many tables with decimal fields, please choose generic key

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBT071 - Too many tables with decimal fields, please choose generic key ?

  The SAP error message CNVMBT071 indicates that there are too many tables with decimal fields in the context of a data migration or conversion process. This error typically arises during the execution of a migration project, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
  Cause:
  The error occurs because the system has encountered a situation where it cannot handle the number of tables that contain decimal fields. This is often due to the limitations in the migration tool's ability to process multiple decimal fields across various tables simultaneously. The specific threshold for "too many" can depend on the configuration and the version of the SAP system being used.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Choose a Generic Key: The error message suggests that you should choose a generic key for the migration. This means that instead of using specific keys for each table, you should opt for a more generalized approach that reduces the complexity of the migration.
  
  
  Review the Data Model: Analyze the data model to identify which tables are causing the issue. You may need to simplify the data structure or reduce the number of decimal fields being processed at once.
  
  
  Batch Processing: If possible, break down the migration process into smaller batches. This can help in managing the number of tables being processed at any given time.
  
  
  Adjust Migration Settings: Check the settings of the migration tool you are using. There may be configuration options that allow you to adjust how decimal fields are handled or to limit the number of tables processed in a single run.
  
  
  Consult Documentation: Refer to the official SAP documentation for the migration tool you are using. There may be specific guidelines or best practices for handling tables with decimal fields.
  
  
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They may provide insights specific to your system configuration and version.
  
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit, as it provides tools and guidelines for data migration.
  Data Types in SAP: Understanding how SAP handles different data types, especially decimal fields, can help in designing a more efficient migration strategy.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to address the CNVMBT071 error and proceed with your data migration successfully.