How To Fix CNV_PE800 - Lookup manager is already running for other object for more than one hour

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 800

• Message text: Lookup manager is already running for other object for more than one hour

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 CNV_PE800 - Lookup manager is already running for other object for more than one hour ?

  The SAP error message "CNV_PE800 Lookup manager is already running for other object for more than one hour" typically occurs in the context of data migration or conversion processes, particularly when using the SAP Landscape Transformation (SLT) or SAP Data Services tools. This error indicates that a lookup manager process is already active and has been running for an extended period, which can lead to performance issues or deadlocks.
  Cause:
  
  Long-Running Processes: The lookup manager may be processing a large volume of data or complex transformations, causing it to run longer than expected.
  Resource Contention: There may be contention for system resources, such as CPU or memory, which can slow down the lookup process.
  Deadlocks: The process may be stuck in a deadlock situation where it is waiting for resources that are held by other processes.
  Configuration Issues: Incorrect configuration settings for the lookup manager or the data migration process can lead to inefficiencies.
  Data Quality Issues: Poorly structured or corrupted data can cause the lookup process to take longer than anticipated.
  
  Solution:
  
  Monitor the Process: Use transaction codes like SM50 or SM66 to monitor active processes in the SAP system. Identify if the lookup manager is indeed running and check its status.
  Check Logs: Review the logs for any errors or warnings that might indicate what is causing the delay. Look for specific error messages that can provide more context.
  Terminate Long-Running Processes: If the lookup manager is stuck, you may need to terminate the process. Be cautious with this step, as it may lead to data inconsistencies.
  Optimize Performance: 
  
  Review and optimize the data being processed. Ensure that the data is clean and well-structured.
  Adjust the configuration settings for the lookup manager to improve performance.
  
  
  Increase Resources: If resource contention is an issue, consider increasing the system resources (CPU, memory) allocated to the SAP system.
  Retry the Process: After addressing the underlying issues, restart the data migration or conversion process to see if the problem persists.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that may address known issues related to the lookup manager.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the specific tools you are using (e.g., SLT, Data Services) for best practices and troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Performance Tuning: Consider conducting a performance tuning exercise for your SAP environment to ensure optimal operation during data migration processes.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP Support for further assistance.