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

SAP Error Message - Details

• 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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Smart SAP Assistant

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

  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: Extended Warehouse Management -> Master Data -> Storage Types -> Define Storage Type Relationships.
  Here, you can define the relationships between the masked storage types. You will need to specify which storage types can be used in conjunction with each other.
  
  
  
  Create or Modify Relationships:
  
  If the relationship does not exist, create a new entry. If it does exist but is not configured correctly, modify it to ensure that the correct storage types are linked.
  
  
  
  Save Changes:
  
  After defining or modifying the relationships, save your changes.
  
  
  
  Test the Configuration:
  
  Try to perform the operation again that previously resulted in the error to ensure that the issue has been resolved.
  
  
  
  Related Information:
  
  Masked Storage Types: These are storage types that are grouped together for certain operations. They allow for more flexible warehouse management by treating multiple storage types as a single entity.
  Warehouse Tasks: These are the operations that the warehouse management system performs, such as picking, putaway, and inventory management.
  EWM Configuration: Proper configuration of EWM is crucial for the smooth operation of warehouse processes. Ensure that all necessary relationships and settings are correctly defined.
  
  If you continue to experience issues after following these steps, it may be helpful to consult the SAP documentation or reach out to your SAP support team for further assistance.