How To Fix IS556 - Serial number & is locked

SAP Error Message - Details

• Message type: E = Error

• Message class: IS - Equipment management

• Message number: 556

• Message text: Serial number & is locked

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.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IS556 - Serial number & is locked ?

  The SAP error message IS556, which states "Serial number & is locked," typically occurs when you attempt to perform an operation on a serial number that is currently locked in the system. This can happen in various scenarios, such as during goods movements, inventory management, or when trying to perform a transaction involving a serialized material.
  Causes:
  
  In-Use Serial Number: The serial number is currently being used in another transaction or process, which locks it for further operations.
  Incomplete Transactions: A previous transaction involving the serial number was not completed successfully, leaving it in a locked state.
  User Lock: The serial number may be locked by a specific user due to a manual lock or due to a system error.
  System Configuration: Certain configurations in the system may lead to serial numbers being locked under specific conditions.
  
  Solutions:
  
  Check Transaction Status: Verify if the serial number is currently being used in another transaction. You can do this by checking the relevant transaction logs or using transaction codes like MB52 or MB5B to see the status of the serial number.
  Unlock the Serial Number: If you have the necessary permissions, you can unlock the serial number using transaction code IQ02 (Change Serial Number) or IQ01 (Create Serial Number) to check its status and unlock it if possible.
  Complete Pending Transactions: Ensure that any pending transactions involving the serial number are completed. This may involve completing a goods receipt, transfer posting, or other relevant transactions.
  Consult with IT Support: If you are unable to resolve the issue, it may be necessary to consult with your SAP support team or IT department. They can check for any system-level locks or issues that may be causing the problem.
  Review Configuration Settings: If this issue occurs frequently, it may be worth reviewing the configuration settings related to serial number management in your SAP system.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as IQ01, IQ02, IQ03 (Display Serial Number), and MB1A (Goods Withdrawal) to manage serial numbers effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to serial number locking. You can search the SAP Support Portal for specific notes that may address your issue.
  Documentation: Review SAP documentation on serial number management for best practices and troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the IS556 error and take appropriate action to resolve it.