How To Fix LT181 - Invalid input combination

LT181 - Overview

• Message type: E = Error

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

• Message number: 181

• Message text: Invalid input combination

What causes this issue?

The input combination of stock categories "&V1&" (FRM...) and "&V2&"
(TO...) is not valid.

System Response

The system checks the following input combinations:
Field "Stock category FRM" = values ' ', 'Q' or 'S' -> field "Stock
category TO" = values ' ', 'Q' or 'S'
Field "Stock category FRM" = values ' ' or 'Q' -> field "Stock category
TO" = values ' ' or 'R'
The two fields must have different values.

How to fix this error?

Enter a valid field combination.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message LT181 - Invalid input combination ?

  The SAP error message LT181 "Invalid input combination" typically occurs in the context of warehouse management or inventory management processes, particularly when dealing with transfer orders, stock movements, or inventory management transactions. This error indicates that the input parameters provided do not match the expected values or combinations required by the system.
  Causes of LT181 Error
  
  
  Incorrect Input Data: The most common cause is that the data entered does not conform to the expected format or values. This could include:
  
  Invalid material numbers
  Incorrect storage locations
  Mismatched batch numbers
  Invalid movement types
  
  
  
  
  Configuration Issues: There may be configuration settings in the warehouse management module that do not allow the combination of inputs you are trying to use.
  
  
  Missing Master Data: Required master data (like material master, storage location master, etc.) may be missing or incorrectly set up.
  
  
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to perform the action, leading to this error.
  
  
  System Bugs or Limitations: