How To Fix CNV_MBT_46284 - New attachments cannot be created; upper limit for attachment id reached

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT_46 - PCL message class

• Message number: 284

• Message text: New attachments cannot be created; upper limit for attachment id reached

What causes this issue?

No new attachments could be created as the upper limit for storing the
attachments has been reached. No new id can be created.

System Response

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

How to fix this error?

Database maintenance is required.

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_MBT_46284 - New attachments cannot be created; upper limit for attachment id reached ?

  The SAP error message CNV_MBT_46284 indicates that the system has reached the upper limit for attachment IDs, which prevents the creation of new attachments. This is typically encountered in the context of SAP's data migration tools or when dealing with document management systems.
  Cause:
  The error occurs because the system has a predefined limit on the number of attachments that can be created. Each attachment is assigned a unique ID, and once the maximum limit is reached, no new attachments can be added. This can happen in scenarios where a large number of documents or attachments are being processed, such as during data migration or when using certain SAP modules that handle document management.
  Solution:
  To resolve this issue, you can consider the following approaches:
  
  
  Delete Unused Attachments: Review and delete any unnecessary or outdated attachments to free up space for new ones. This can help in reducing the total count of attachments.
  
  
  Increase the Limit: If possible, consult with your SAP Basis or system administrator to see if the limit for attachment IDs can be increased. This may involve configuration changes in the system.
  
  
  Archive Old Attachments: If there are attachments that are no longer needed for day-to-day operations, consider archiving them. This can help in managing the number of active attachments.
  
  
  Check for Errors in Attachment Creation: Ensure that there are no errors in the processes that create attachments. Sometimes, failed attempts to create attachments can lead to ID consumption without actual attachments being created.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or updates that may address this issue. There may be specific patches or recommendations provided by SAP.
  
  
  Review Custom Developments: If there are custom developments or enhancements in your SAP system that handle attachments, review them to ensure they are not contributing to the issue.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for your specific version to understand the limits and configurations related to attachments.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  System Monitoring: Implement monitoring for attachment usage to proactively manage the number of attachments and avoid hitting the limit in the future.
  
  If the problem persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.