How To Fix RSL_UI044 - File type of &1 is not supported

RSL_UI044 - Overview

• Message type: E = Error

• Message class: RSL_UI -

• Message number: 044

• Message text: File type of &1 is not supported

What causes this issue?

You are trying to upload a file with a file type that is not supported.

System Response

The system only supports Microsoft Excel files (<ZK>xls, xlsx</>) or
comma-separated values (<ZK>csv</>).
The only browser that supports loading Microsoft Excel files (<ZK>xls,
xlsx</>) is Internet Explorer.
There is also a system setting that prevents Microsoft Excel files (<ZK>
xls, xlsx</>) from being uploaded.

How to fix this error?

Upload a different file.
If the file is a text file (txt), and the values are separated by
commas, rename the file so that it ends with <ZK>csv</>.

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.

RSL_UI044 - Details

• The SAP error message RSL_UI044, which states "File type of &1 is not supported," typically occurs when you are trying to upload or process a file in SAP that is not in a supported format. The placeholder &1 will be replaced with the actual file type (e.g., .txt, .csv, .xls, etc.) that you are attempting to use.
  Causes:
  
  Unsupported File Format: The file you are trying to upload is not in a format that SAP supports for the specific transaction or function you are using.
  Incorrect File Extension: The file may have the correct content but an incorrect file extension, leading SAP to reject it.
  
  Configuration Issues: There may be configuration settings in SAP that restrict the types of files that can be processed.
  User Permissions: The user may not have the necessary permissions to upload certain file types.
  
  Solutions:
  
  Check Supported File Types: Refer to the SAP documentation or the specific transaction's help section to find