How To Fix WTY201 - Incorrect item type &1 item &2 for generation function

SAP Error Message - Details

• Message type: E = Error

• Message class: WTY - Warranty processing

• Message number: 201

• Message text: Incorrect item type &1 item &2 for generation function

What causes this issue?

Item type <LS>List</> (<LS>EXP</>) has to be selected if you want to be
able to execute this function. Only then can new items be created
(exploded) from this item.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WTY201 - Incorrect item type &1 item &2 for generation function ?

  The SAP error message:
  WTY201 Incorrect item type &1 item &2 for generation function
  
  Cause:
  This error occurs during the generation of a payment medium or payment file in SAP (usually in the context of payment program or payment medium workbench). It indicates that the item type of a line item (e.g., invoice, credit memo, or payment item) is not compatible or allowed for the specific generation function being executed.
  In other words, the payment medium generation function expects certain types of items (like invoices or payments), but it encountered an item with an incorrect or unexpected item type.
  
  Explanation:
  
  Item type &1: This is the type of the item that caused the error (e.g., 'I' for invoice, 'P' for payment, etc.).
  Item &2: This is the specific item number or identifier in the payment medium or payment file generation process.
  
  The generation function is designed to process only certain item types. If an item of a different type is passed, the system throws this error.
  
  Common Scenarios:
  
  Custom payment medium formats where the logic expects only certain item types.
  Incorrect configuration of the payment medium or payment program.
  Data inconsistencies where the item type in the payment document does not match the expected types.
  Using a generation function that does not support the item type present in the payment data.
  
  
  Solution:
  
  
  Check the Payment Medium Configuration:
  
  Review the payment medium format and the generation function assigned.
  Verify which item types are allowed for the generation function.
  Adjust the configuration if necessary to include the required item types.
  
  
  
  Check the Payment Document Data:
  
  Verify the item types of the payment items being processed.
  Ensure that the payment document items are correctly classified.
  
  
  
  Adjust the Generation Function Logic:
  
  If you are using a custom generation function (e.g., in a custom payment medium), check the code or logic that processes item types.
  Modify the logic to handle the item types correctly or exclude unsupported types.
  
  
  
  SAP Notes and Documentation:
  
  Search for SAP Notes related to WTY201 for any known issues or patches.
  Review SAP documentation on Payment Medium Workbench (PMW) and payment program configuration.
  
  
  
  Testing:
  
  After adjustments, test the payment medium generation with different item types to ensure the error is resolved.
  
  
  
  
  Related Information:
  
  Transaction codes: F110 (Automatic Payment Transactions), FPY1 (Payment Medium Workbench)
  Tables: PAYR (Payment Medium Data), REGUH (Payment Document Header), REGUP (Payment Document Items)
  SAP Notes: Check SAP Support Portal for notes related to WTY201 or payment medium generation errors.
  Payment Medium Workbench (PMW) documentation for customizing payment formats and generation functions.
  
  
  If you provide more context (e.g., which transaction or process triggers this error, or if you are using a custom payment medium), I can help with more specific guidance.