How To Fix FB381 - Enter a different form ID; form ID & is reserved

FB381 - Overview

• Message type: E = Error

• Message class: FB - Batch Programs

• Message number: 381

• Message text: Enter a different form ID; form ID & is reserved

What causes this issue?

You entered "ER", "LI" or "RE" as form ID's. However, these form ID's
are reserved only for the error list, the check list and the results
table by the program.
For the form set of the letter and the reply, you can only assign and
select ID's which are not those above.

System Response

Termination of processing.

How to fix this error?

Check your entry. If necessary, change form allocation for the ID by
using customizing.

Error message extract from SAP system. Copyright SAP SE.

FB381 - Details

• The SAP error message FB381 ("Enter a different form ID; form ID & is reserved") typically occurs when you are trying to use a form ID that is already reserved or in use within the SAP system. This can happen in various contexts, such as when working with payment forms, invoices, or other document types that require specific form IDs.
  
  Cause:
  
  Reserved Form ID: The form ID you are trying to use is already reserved for a specific purpose or document type in the SAP system.
  System Configuration: The form ID may be configured in the system settings to be used exclusively for certain transactions or processes.
  User Permissions: The user may not have the necessary permissions to use the specified form ID.
  
  
  Solution:
  
  Choose a Different Form ID: The simplest solution is to select a different form ID that is not reserved. You can check the available form IDs in the system to find one