How To Fix CN847 - Dates for network & activity & cannot be locked

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 847

• Message text: Dates for network & activity & cannot be locked

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 CN847 - Dates for network & activity & cannot be locked ?

  The SAP error message CN847 ("Dates for network & activity & cannot be locked") typically occurs in the context of project management and network scheduling within SAP. This error indicates that the system is unable to lock the dates for a specific network or activity, which can prevent changes from being made to the project schedule.
  Causes:
  
  Concurrent Access: Another user or process may be accessing the same network or activity, preventing the system from locking it for your transaction.
  Background Jobs: A background job may be running that is currently processing the same network or activity.
  Inconsistent Data: There may be inconsistencies in the data related to the network or activity that prevent it from being locked.
  Authorization Issues: The user may not have the necessary authorizations to lock the network or activity.
  System Configuration: There may be configuration settings in the project management module that are affecting the locking mechanism.
  
  Solutions:
  
  Check for Concurrent Users: Verify if another user is currently working on the same network or activity. If so, wait for them to finish before trying again.
  Review Background Jobs: Check if there are any background jobs running that might be accessing the same data. You can do this using transaction codes like SM37 to monitor job status.
  Data Consistency Check: Perform a consistency check on the network and activity data to ensure there are no issues. You can use transaction codes like CN22 (Change Network) or CN41 (Network Overview) to review the data.
  Authorization Check: Ensure that you have the necessary authorizations to perform the action you are attempting. Consult with your SAP security team if needed.
  Retry Later: If the issue is due to temporary locking by another process, simply waiting a few moments and trying again may resolve the issue.
  Contact SAP Support: If the problem persists, consider reaching out to SAP support for further assistance, especially if you suspect a system bug or configuration issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CN22 (Change Network), CN41 (Network Overview), and CN01 (Create Network) to navigate project management tasks.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for relevant notes in the SAP Support Portal.
  Documentation: Review SAP documentation on project management and network scheduling for best practices and troubleshooting tips.
  
  By following these steps, you should be able to identify the cause of the CN847 error and take appropriate action to resolve it.