How To Fix ACE401 - Enter parameter &1 when calling up legacy data transfer

SAP Error Message - Details

• Message type: E = Error

• Message class: ACE - Nachrichten zur Accrual Engine

• Message number: 401

• Message text: Enter parameter &1 when calling up legacy data transfer

What causes this issue?

Function module &V2& is not being called up correctly.

System Response

Processing cannot continue.

How to fix this error?

When calling up function module &V2&, fill parameter &V1&.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ACE401 - Enter parameter &1 when calling up legacy data transfer ?

  The SAP error message ACE401, which states "Enter parameter &1 when calling up legacy data transfer," typically occurs when a required parameter for a legacy data transfer process is missing or not provided. This error is often encountered during data migration or when using specific transaction codes related to legacy data transfer.
  Cause:
  The primary cause of this error is that the system expects a specific parameter (denoted by &1) to be entered, but it has not been provided. This could be due to:
  
  User error: The user may have skipped entering a required field.
  Configuration issues: The system may not be properly configured to handle the legacy data transfer.
  Missing or incorrect settings in the data transfer program.
  
  Solution:
  To resolve the ACE401 error, you can take the following steps:
  
  
  Check Required Fields: Ensure that all required fields are filled in before executing the legacy data transfer. Look for any fields marked with an asterisk (*) or any fields that are highlighted as mandatory.
  
  
  Review Documentation: Consult the documentation for the specific legacy data transfer program you are using. This may provide insights into what parameters are required.
  
  
  Parameter Entry: If you know what parameter &1 refers to, enter the appropriate value. This could be a specific code, identifier, or other relevant data.
  
  
  Transaction Code: Make sure you are using the correct transaction code for the legacy data transfer. Sometimes, using the wrong transaction can lead to missing parameters.
  
  
  Consult with Technical Team: If you are unsure about what parameter is needed, consult with your SAP technical team or a functional consultant who can provide guidance based on the specific context of your data transfer.
  
  
  Check Customizations: If your SAP system has been customized, check if there are any custom fields or parameters that need to be filled in for the legacy data transfer to work correctly.
  
  
  SAP Notes: Search for relevant SAP Notes or Knowledge Base Articles (KBAs) that might address this specific error. SAP frequently updates its documentation and provides fixes for known issues.
  
  
  Related Information:
  
  Legacy Data Transfer: This process typically involves migrating data from a legacy system into SAP. It may involve using tools like LSMW (Legacy System Migration Workbench) or other data migration tools.
  Transaction Codes: Familiarize yourself with the transaction codes related to legacy data transfer, such as LSMW, which is commonly used for data migration.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  
  By following these steps, you should be able to identify the missing parameter and successfully execute the legacy data transfer without encountering the ACE401 error.