How To Fix CNV_CDMC_CA256 - Currently no free background work processes available; job is scheduled

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CDMC_CA - CDMC Clearing Analysis

• Message number: 256

• Message text: Currently no free background work processes available; job is scheduled

What causes this issue?

Currently there are no background work processes available in the
remote system.

System Response

A job is scheduled nevertheless. As soon as a background work process
becomes available, this job will be released.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_CDMC_CA256 - Currently no free background work processes available; job is scheduled ?

  The SAP error message CNV_CDMC_CA256 indicates that there are currently no free background work processes available to execute a scheduled job. This can occur in various scenarios, particularly during data migration or conversion processes, where background jobs are essential for processing large volumes of data.
  Causes:
  
  High Workload: The system may be experiencing a high volume of background jobs, leading to all available work processes being occupied.
  Configuration Issues: The number of background work processes configured in the SAP system may be insufficient for the current workload.
  Long-Running Jobs: Some background jobs may be taking longer than expected to complete, thus occupying the work processes.
  System Performance Issues: General performance issues in the SAP system can lead to delays in job processing.
  Job Scheduling Conflicts: Multiple jobs may be scheduled to run at the same time, leading to contention for available work processes.
  
  Solutions:
  
  Monitor Background Jobs: Use transaction SM37 to monitor the status of background jobs. Identify any long-running or stuck jobs and take appropriate action (e.g., cancel or reschedule them).
  Increase Background Work Processes: If the workload consistently exceeds the available work processes, consider increasing the number of background work processes in the system configuration. This can be done in transaction RZ10 by adjusting the instance profile parameters (e.g., rdisp/wp_no_btc).
  Optimize Job Scheduling: Stagger the scheduling of background jobs to avoid conflicts and ensure that they do not all run simultaneously.
  Check System Performance: Investigate any performance issues in the system that may be affecting job execution. This may involve checking system resources (CPU, memory, etc.) and optimizing database performance.
  Review Job Definitions: Ensure that the jobs are defined correctly and are not set to run more frequently than necessary.
  
  Related Information:
  
  
  Transaction Codes:
  
  SM37: Monitor background jobs.
  RZ10: Change instance profile parameters.
  SM50: Monitor work processes.
  SM66: Monitor global work processes.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to background processing or the CNV_CDMC_CA256 error.
  
  
  Documentation: Review SAP documentation related to background processing and job scheduling for best practices and configuration guidelines.
  
  
  By following these steps, you should be able to resolve the CNV_CDMC_CA256 error and ensure that your background jobs can execute as intended.