How To Fix L3457 - Changes not allowed in customer exit for transfer order split

SAP Error Message - Details

• Message type: E = Error

• Message class: L3 -

• Message number: 457

• Message text: Changes not allowed in customer exit for transfer order split

What causes this issue?

You have changed the transmission table of the customer exit in a way
that is not permissible. The <DS:MO.EXIT_SAPLL03A_012>documentation of
the customer exit</> describes in detail that only the fields 'REIHF'
and 'POOLN' may be changed there .
If specific items occur in handling units, then different criteria must
be taken into consideration.
If there is a handling unit item in a transfer order, all the items of
this order must be handling units.
If the indicator for separate confirmation is set for a transfer order
item, this indicator must also be set for all other items of this
order.
HU TO items and the respective material items must not be split up into
different transfer orders (this can be determined from the different
characteristics of the field FHUTA).

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?

Check whether other fields in the customer exit have been changed.
Inserting new entries into the table or removing existing entries is
not allowed.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message L3457 - Changes not allowed in customer exit for transfer order split ?

  The SAP error message L3457, "Changes not allowed in customer exit for transfer order split," typically occurs during the process of splitting transfer orders in the SAP system. This error indicates that there are restrictions in place that prevent modifications to certain fields or data during the execution of a customer exit related to transfer order processing.
  Cause:
  
  Customer Exit Restrictions: The error is often triggered by the logic defined in a customer exit (a user-defined enhancement) that is preventing changes to specific fields during the transfer order split process.
  Data Integrity: SAP enforces data integrity rules to ensure that the transfer order remains consistent and valid. If the system detects an attempt to change data that is not allowed during the split, it raises this error.
  Configuration Issues: There may be configuration settings in the system that restrict changes to certain fields during the transfer order processing.
  
  Solution:
  
  Review Customer Exit Logic: Check the code in the customer exit that is being executed during the transfer order split. Look for any conditions that might be preventing changes to the relevant fields. You may need to modify the logic to allow for the necessary changes.
  Debugging: Use the SAP debugger to trace the execution of the customer exit and identify the exact point where the error is raised. This can help you understand why the changes are being blocked.
  Consult Documentation: Review SAP documentation or notes related to the specific customer exit you are using. There may be known issues or recommendations for handling this error.
  Configuration Review: Check the configuration settings related to transfer orders and customer exits in your SAP system. Ensure that they are set up correctly and that there are no conflicting settings.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide guidance on how to resolve it.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LT03 (Transfer Order Split) and LT12 (Confirm Transfer Order) to understand the context in which the error occurs.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Testing: After making changes to the customer exit or configuration, conduct thorough testing to ensure that the transfer order split process works as expected without triggering the error.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.