How To Fix CNV_PE851 - Failed to open the free selection dialog

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 851

• Message text: Failed to open the free selection dialog

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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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 CNV_PE851 - Failed to open the free selection dialog ?

  The SAP error message "CNV_PE851 Failed to open the free selection dialog" typically occurs in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error can arise due to various reasons, and here are some common causes, potential solutions, and related information:
  Causes:
  
  Authorization Issues: The user may not have the necessary authorizations to access the free selection dialog.
  Configuration Problems: There may be issues with the configuration of the migration tool or the specific data migration project.
  System Performance: If the system is under heavy load or if there are performance issues, it may fail to open dialogs.
  Missing or Incomplete Data: Required data or settings may be missing, leading to the failure of the dialog.
  Software Bugs: There may be bugs in the version of the software being used, which could lead to this error.
  
  Solutions:
  
  Check Authorizations: Ensure that the user has the necessary authorizations to access the free selection dialog. This can be done by checking the user roles and authorizations in the SAP system.
  Review Configuration: Verify the configuration settings for the migration project. Ensure that all necessary parameters are correctly set.
  System Performance: Monitor the system performance and check for any bottlenecks. If the system is slow, consider optimizing performance or trying again later.
  Data Validation: Check if all required data is present and correctly configured. Ensure that there are no missing entries that could cause the dialog to fail.
  Update Software: If you suspect a bug, check for any available updates or patches for your SAP system. Applying the latest updates may resolve the issue.
  Consult SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message. SAP frequently releases notes that provide solutions or workarounds for known issues.
  
  Related Information:
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more specific guidance based on your system configuration and version.
  Community Forums: Engaging with the SAP Community or forums can also be helpful, as other users may have encountered and resolved similar issues.
  Documentation: Review the official SAP documentation related to the migration tool you are using, as it may contain troubleshooting steps specific to your scenario.
  
  By following these steps, you should be able to diagnose and potentially resolve the "CNV_PE851 Failed to open the free selection dialog" error in your SAP environment.