How To Fix VCH_HL_EXT_MATERIAL001 - Error: "Enqueue mode changed" for material &.

SAP Error Message - Details

• Message type: E = Error

• Message class: VCH_HL_EXT_MATERIAL - Exception messages for master data access: material

• Message number: 001

• Message text: Error: "Enqueue mode changed" for material &.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message VCH_HL_EXT_MATERIAL001 - Error: "Enqueue mode changed" for material &. ?

  The SAP error message VCH_HL_EXT_MATERIAL001 with the description "Enqueue mode changed" typically occurs when there is a conflict in the locking mechanism for a material in the SAP system. This can happen in various scenarios, such as when multiple users or processes are trying to access or modify the same material simultaneously.
  Cause:
  
  Concurrent Access: The error often arises when one user or process is trying to change the material while another user or process has it locked for editing.
  Lock Conflicts: If a material is being processed in a transaction that requires a lock, and another transaction tries to access it, the enqueue mode may change, leading to this error.
  Background Jobs: Sometimes, background jobs or batch processes may also cause this issue if they are trying to access the same material.
  
  Solution:
  
  Check Lock Entries: Use transaction code SM12 to check for lock entries related to the material. You can identify which user or process is holding the lock and take appropriate action.
  Wait and Retry: If the error is due to temporary locking, waiting for a few moments and then retrying the operation may resolve the issue.
  Coordinate with Users: If multiple users are working on the same material, coordinate with them to avoid simultaneous changes.
  Review Background Jobs: If background jobs are involved, review their schedules and ensure they do not conflict with user activities.
  System Logs: Check system logs for any additional information that might help diagnose the issue further.
  
  Related Information:
  
  Enqueue Mechanism: SAP uses an enqueue mechanism to manage locks on objects (like materials) to ensure data integrity. Understanding how this mechanism works can help in troubleshooting similar issues.
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related errors or warnings.
  SE11: To check the data dictionary for the material master table and understand its structure.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for the error message or related keywords in the SAP Support Portal.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.