How To Fix /SCWM/DELIVERY535 - &1 items not processed due to locking errors

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/DELIVERY -

• Message number: 535

• Message text: &1 items not processed due to locking errors

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/DELIVERY535 - &1 items not processed due to locking errors ?

  The SAP error message /SCWM/DELIVERY535 indicates that certain items in a delivery could not be processed due to locking errors. This typically occurs in the context of the Extended Warehouse Management (EWM) module when multiple processes or users attempt to access or modify the same data simultaneously, leading to a conflict.
  Cause:
  
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If one user or process is currently working on a delivery or item, other users or processes trying to access the same item will encounter a locking error.
  Long-running Transactions: If a transaction takes too long to complete, it can hold locks for an extended period, causing other transactions to fail.
  Concurrent Processing: Multiple users or background jobs trying to process the same delivery or items at the same time can lead to locking issues.
  System Performance: High system load or performance issues can exacerbate locking problems.
  
  Solution:
  
  Identify the Lock: Use transaction code SM12 to check for existing locks on the relevant delivery or items. This will help you identify which user or process is holding the lock.
  Wait and Retry: If the lock is temporary, waiting for the other process to complete may resolve the issue. You can then retry processing the delivery.
  Optimize Transactions: Review and optimize long-running transactions to ensure they complete more quickly and release locks sooner.
  Reduce Concurrent Access: If possible, limit the number of users or processes that can access the same delivery or items simultaneously.
  Check for Background Jobs: If background jobs are causing locks, consider scheduling them during off-peak hours.
  System Performance Tuning: If locking issues are frequent, consider reviewing system performance and tuning it to handle concurrent processes better.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to locking in EWM.
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (to view locks), SM21 (to check system logs), and ST22 (to analyze dumps) for troubleshooting.
  EWM Configuration: Review your EWM configuration to ensure that it is set up optimally for your business processes.
  User Training: Ensure that users are trained on how to handle deliveries and understand the implications of concurrent processing.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult with SAP support for further assistance.