How To Fix LT181 - Invalid input combination

SAP Error Message - Details

• 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: In some cases, there may be bugs or limitations in the specific version of SAP you are using.
  
  
  Solutions to LT181 Error
  
  
  Check Input Data: Verify that all input data is correct. Ensure that:
  
  Material numbers are valid and exist in the system.
  Storage locations and batches are correctly specified.
  Movement types are appropriate for the transaction.
  
  
  
  Review Configuration: Check the configuration settings in the warehouse management module to ensure that the combinations you are trying to use are allowed.
  
  
  Master Data Verification: Ensure that all necessary master data is correctly set up and active. This includes checking the material master, storage location, and batch management settings.
  
  
  User Authorizations: Confirm that the user has the necessary authorizations to perform the transaction. If not, contact your SAP security team to adjust the permissions.
  
  
  Consult Documentation: Refer to SAP documentation or help files for specific details about the error and the expected input combinations.
  
  
  SAP Notes and Support: If the issue persists, check for any relevant SAP Notes that may address this error. You can also reach out to SAP support for assistance.
  
  
  Related Information
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LT01 (Create Transfer Order), LT02 (Change Transfer Order), and LT03 (Display Transfer Order) to understand where the error might be occurring.
  Debugging: If you have access to debugging tools, you can analyze the program flow to identify where the invalid combination is being triggered.
  User Forums: Consider checking SAP community forums or user groups for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify the cause of the LT181 error and implement a solution to resolve it.