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

/SCWM/LT166 - Overview

• Message type: E = Error

• Message class: /SCWM/LT -

• Message number: 166

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

Self-Explanatory Message

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/SCWM/LT166 - Details

• The SAP error message /SCWM/LT166 indicates that there is a missing relationship definition between masked storage types in the Extended Warehouse Management (EWM) module. This error typically arises when you are trying to perform a task that involves storage types that have not been properly configured to recognize their relationship.
  
  Cause:
  The error occurs when:
  
  You are trying to execute a warehouse task or process that involves two or more storage types that are masked (i.e., they are defined in a way that they should be treated as a group).
  The system does not have a defined relationship between these masked storage types, which is necessary for the operation to proceed.
  
  
  Solution:
  To resolve this error, you need to define the relationship between the masked storage types. Here are the steps to do this:
  
  
  Access the EWM Configuration:
  
  Go to the SAP Easy Access screen and navigate to the EWM configuration area.
  
  
  
  Define Storage Type Relationships:
  
  Navigate to the path: