How To Fix BT644 - Only class C job can be defined. Go to system admin. to release job.

SAP Error Message - Details

• Message type: E = Error

• Message class: BT - Background processing messages

• Message number: 644

• Message text: Only class C job can be defined. Go to system admin. to release job.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message BT644 - Only class C job can be defined. Go to system admin. to release job. ?

  The SAP error message BT644 ("Only class C job can be defined. Go to system admin. to release job.") typically occurs when there is an issue with the job class assigned to a background job in the SAP system. This error indicates that the job you are trying to define or release is not assigned to the correct job class, which is required for the job to be processed.
  Cause:
  
  Job Class Assignment: The job is assigned to a class that is not allowed for the current operation. In SAP, jobs can be assigned to different classes (A, B, C, etc.), and each class has specific characteristics and permissions.
  System Configuration: The system may be configured to only allow certain types of jobs (like class C) to be processed in the current environment or under specific conditions.
  Authorization Issues: The user may not have the necessary authorizations to release or manage jobs in the specified class.
  
  Solution:
  
  
  Check Job Class: 
  
  Go to transaction code SM37 (Job Monitoring) and check the job class assigned to the job that is causing the error.
  If the job is not assigned to class C, you may need to change the job class to class C or another appropriate class that is allowed.
  
  
  
  Change Job Class:
  
  If you have the necessary authorizations, you can change the job class by editing the job definition in transaction SM36 (Define Background Job).
  Ensure that the job is assigned to class C if that is the requirement.
  
  
  
  System Administration:
  
  If you do not have the necessary permissions to change the job class, you may need to contact your system administrator or someone with the appropriate authorizations to assist you in releasing the job.
  
  
  
  Review System Settings:
  
  Check the system settings related to job classes in transaction SM62 (Job Class Management) to ensure that class C is properly configured and available for use.
  
  
  
  Authorization Check:
  
  Ensure that your user profile has the necessary authorizations to manage background jobs. You may need to consult with your security team to verify your permissions.
  
  
  
  Related Information:
  
  Job Classes: In SAP, job classes are used to categorize background jobs based on their priority and resource requirements. Class A jobs are high priority, class B jobs are medium priority, and class C jobs are low priority.
  Transaction Codes:
  
  SM36: Define Background Job
  SM37: Job Monitoring
  SM62: Job Class Management
  
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions related to this error message.
  
  By following these steps, you should be able to resolve the BT644 error and successfully manage your background jobs in SAP.