How To Fix WRB020 - Lock error reading data for material &1.

SAP Error Message - Details

• Message type: E = Error

• Message class: WRB - Messages for Revaluation at Retail via BAPIs

• Message number: 020

• Message text: Lock error reading data for material &1.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WRB020 - Lock error reading data for material &1. ?

  The SAP error message:
  WRB020: Lock error reading data for material &1
  
  Meaning / Cause:
  This error occurs when SAP tries to read or update material master data but encounters a lock conflict. Specifically, the system cannot obtain a lock on the material master record because it is already locked by another user or process. This lock prevents simultaneous changes to ensure data consistency and integrity.
  Common causes include:
  
  Another user or background job is currently editing or processing the same material master record.
  A previous transaction did not release the lock properly (e.g., due to a system crash or incomplete transaction).
  Long-running processes or batch jobs holding locks on the material master.
  Deadlocks or lock wait timeouts in the system.
  
  
  Solution / How to resolve:
  
  
  Check who holds the lock:
  
  Use transaction SM12 (Lock Entries) to find locks on the material master.
  Enter the material number or relevant object (e.g., MATERIAL or MARA table) to see if there are active locks.
  
  
  
  Analyze and release locks:
  
  If the lock is held by a user who is no longer working on it (e.g., session crashed), you can manually delete the lock entry in SM12.
  If the lock is held by an active user or process, coordinate with them to finish or terminate the transaction.
  
  
  
  Wait and retry:
  
  Sometimes locks are temporary. Wait a few minutes and try the operation again.
  
  
  
  Check for long-running jobs:
  
  Identify any batch jobs or background processes that might be locking the material master and schedule them appropriately.
  
  
  
  System health check:
  
  If locks are frequent and not released properly, check for system issues or bugs.
  Review system logs (SM21) and short dumps (ST22) for related errors.
  
  
  
  Technical investigation:
  
  If the problem persists, involve your Basis team to check for database locks or deadlocks.
  Check for OSS notes related to WRB020 for your SAP version.
  
  
  
  
  Related Information:
  
  Transaction SM12: Display and manage lock entries.
  Tables involved: Material master data is stored mainly in tables like MARA, MARC, MBEW, etc.
  Lock object: Material master locks are usually related to lock object MATERIAL.
  SAP Notes: Search SAP Support Portal for notes related to WRB020 or material master lock issues.
  Best practice: Avoid simultaneous editing of the same material master by multiple users.
  
  
  Summary:
  WRB020 indicates a lock conflict on material master data. The primary action is to identify and clear the lock using SM12 or wait for the lock to be released. Coordination among users and monitoring background jobs can prevent recurring issues.