How To Fix L1603 - Special stock number requires entry of special stock indicator

L1603 - Overview

• Message type: E = Error

• Message class: L1 - Message handling for WM master data

• Message number: 603

• Message text: Special stock number requires entry of special stock indicator

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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• What is the cause and solution for SAP error message L1603 - Special stock number requires entry of special stock indicator ?

  The SAP error message L1603, which states "Special stock number requires entry of special stock indicator," typically occurs in the context of inventory management and logistics when dealing with special stock types, such as consignment stock, project stock, or returnable packaging.
  
  Cause:
  This error arises when you are trying to process a transaction that involves special stock but have not specified the required special stock indicator. The special stock indicator is necessary for SAP to understand the type of special stock being referenced, as different types of special stock have different handling and accounting rules.
  
  Solution:
  To resolve this error, you should follow these steps:
  
  
  Identify the Transaction: Determine which transaction you are trying to perform (e.g., goods receipt, goods issue, stock transfer, etc.) that triggered the error.
  
  
  Check the Special Stock Indicator:
  
  Ensure that you have entered the correct special stock indicator in the relevant field. This is usually a dropdown or input field where you