How To Fix CRM_MKTTG_SEG_BWA304 - Shared memory error for MDD: Detach not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_MKTTG_SEG_BWA - Messages for CRM Segment Builder BWA Access

• Message number: 304

• Message text: Shared memory error for MDD: Detach not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CRM_MKTTG_SEG_BWA304 - Shared memory error for MDD: Detach not possible ?

  The SAP error message CRM_MKTTG_SEG_BWA304 indicates a shared memory error related to the Market Development Database (MDD) in the context of SAP CRM (Customer Relationship Management). This error typically occurs when there are issues with the shared memory segments that are used by the SAP system for various operations, including those related to the MDD.
  Cause:
  
  
  Shared Memory Issues: The error often arises when the system is unable to detach from a shared memory segment. This can happen due to:
  
  The shared memory segment being in use by another process.
  The segment being corrupted or improperly configured.
  Insufficient permissions to detach from the shared memory segment.
  System resource limits being reached (e.g., maximum number of shared memory segments).
  
  
  
  Configuration Issues: Incorrect configuration of the shared memory parameters in the SAP system profile can lead to this error.
  
  
  System Resource Exhaustion: If the system is under heavy load or if there are memory leaks, it may not be able to manage shared memory segments effectively.
  
  
  Solution:
  
  
  Check Shared Memory Segments: Use transaction SM51 to check the status of the application servers and shared memory segments. Look for any processes that might be holding onto the shared memory.
  
  
  Restart the Application Server: If possible, restart the affected application server. This can help release any locks on the shared memory segments.
  
  
  Review System Logs: Check the system logs (transaction SM21) for any related errors or warnings that might provide more context about the issue.
  
  
  Adjust Memory Parameters: Review and adjust the shared memory parameters in the instance profile. Parameters such as shmmax, shmmin, and shmall may need to be configured based on your system's requirements.
  
  
  Check for Resource Limits: Ensure that the operating system's resource limits (like maximum number of shared memory segments) are not being exceeded. You may need to adjust kernel parameters on the operating system level.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates that resolve known issues.
  
  
  Consult SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more specific guidance based on your system configuration and logs.
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM51: To view the list of application servers and their statuses.
  SM21: To check system logs for errors.
  ST02: To monitor memory usage and performance.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for more details on shared memory management and configuration.
  
  
  System Monitoring: Regularly monitor system performance and memory usage to prevent such issues from occurring in the future.
  
  
  By following these steps, you should be able to diagnose and resolve the CRM_MKTTG_SEG_BWA304 shared memory error in your SAP system.