How To Fix LT166 - Relationship between masked storage types must first be defined

LT166 - Overview

• Message type: E = Error

• Message class: LT - LE-WM: View or Table Maintenance Error Messages

• Message number: 166

• Message text: Relationship between masked storage types must first be defined

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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Smart SAP Assistant

• What is the cause and solution for SAP error message LT166 - Relationship between masked storage types must first be defined ?

  The SAP error message LT166, which states "Relationship between masked storage types must first be defined," typically occurs in the context of warehouse management and inventory management processes. This error indicates that there is an attempt to perform a warehouse task or transfer that involves storage types that have not been properly defined in the system.
  
  Cause:
  The error is usually caused by one of the following reasons:
  
  Undefined Relationships: The storage types involved in the operation are masked (i.e., they are not directly accessible or are restricted) and do not have a defined relationship in the system.
  
  Configuration Issues: The configuration settings for the warehouse management system (WMS) may not have been set up correctly, particularly regarding the relationships between different storage types.
  Warehouse Process Types: The process types that govern how goods are moved between storage types may not be properly configured to handle the specific storage types involved.
  
  
  Solution:
  To resolve the LT166 error,