How To Fix DPR_SHARED814 - Could not lock all tasks: Scheduling is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: DPR_SHARED - Development Projects: Messages for Shared Objects

• Message number: 814

• Message text: Could not lock all tasks: Scheduling is not possible

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 DPR_SHARED814 - Could not lock all tasks: Scheduling is not possible ?

  The SAP error message DPR_SHARED814 indicates that the system is unable to lock all tasks for scheduling, which prevents the scheduling process from proceeding. This error typically arises in the context of project management and resource planning within SAP, particularly when using the SAP Project System (PS) or SAP Portfolio and Project Management (PPM) modules.
  Causes:
  
  Concurrent Access: Another user or process may be accessing the same tasks or project elements, leading to a lock contention.
  Long-Running Transactions: If a transaction is taking too long to complete, it may hold locks on the tasks, preventing others from accessing them.
  System Performance Issues: High system load or performance issues can lead to delays in lock acquisition.
  Configuration Issues: Incorrect configuration settings in the project management module may lead to locking issues.
  Database Locks: Locks at the database level can also cause this issue, especially if there are long-running database transactions.
  
  Solutions:
  
  Check for Active Sessions: Use transaction codes like SM12 (to view and delete locks) to check if there are any active locks on the tasks. If you find locks that are no longer needed, you can delete them.
  Wait and Retry: If the issue is due to concurrent access, waiting for a short period and then retrying the scheduling operation may resolve the issue.
  Optimize Long-Running Transactions: Review and optimize any long-running transactions that may be holding locks. Ensure that users complete their tasks in a timely manner.
  System Performance Monitoring: Monitor system performance and resource usage. If the system is under heavy load, consider scheduling tasks during off-peak hours.
  Check Configuration: Review the configuration settings in the project management module to ensure they are set up correctly.
  Database Administration: If database locks are suspected, consult with your database administrator to investigate and resolve any underlying database issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (to manage locks), SM21 (to check system logs), and ST22 (to check dumps).
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Documentation: Review SAP documentation related to project management and scheduling for best practices and guidelines.
  
  If the problem persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.