How To Fix MC354 - Lock mode & not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 354

• Message text: Lock mode & not allowed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MC354 - Lock mode & not allowed ?

  The SAP error message MC354 ("Lock mode & not allowed") typically occurs in the context of inventory management or material management when there is an attempt to perform an operation that is not permitted due to the current lock mode of the data being accessed. This can happen in various scenarios, such as during inventory counts, stock transfers, or when trying to change material master data.
  Cause:
  
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If a record is locked by another user or process, you may encounter this error when trying to access or modify that record.
  Transaction Type: Certain transactions may require specific lock modes (e.g., exclusive or shared locks). If the transaction you are trying to perform is not compatible with the current lock mode, this error will occur.
  Concurrent Access: Multiple users or processes trying to access the same data simultaneously can lead to this error if the system cannot grant the required lock.
  
  Solution:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. You can identify if another user or process is holding a lock on the data you are trying to access.
  Wait and Retry: If the lock is held by another user, you may need to wait until they complete their transaction. You can also communicate with the user to understand the situation.
  Change Lock Mode: If you have the necessary permissions, you may need to change the lock mode of the transaction you are trying to perform. This may involve adjusting the configuration or the way the transaction is executed.
  Review Transaction Logic: Ensure that the transaction you are trying to execute is appropriate for the current state of the data. For example, if you are trying to post a goods movement while a physical inventory is being conducted, you may need to wait until the inventory is completed.
  Consult Documentation: Review SAP documentation or consult with your SAP Basis or functional team for specific guidance related to the transaction you are working with.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB1A, MB1B, MB1C, etc., depending on the context of your operation.
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message MC354.
  User Authorizations: Ensure that you have the necessary authorizations to perform the transaction you are attempting.
  System Performance: Sometimes, system performance issues can lead to locking problems. Ensure that the SAP system is running optimally.
  
  If the issue persists after trying the above solutions, it may be beneficial to involve your SAP support team for further investigation.