How To Fix RSL_UI166 - Internal error while processing the file (error text: '&1')

RSL_UI166 - Overview

• Message type: E = Error

• Message class: RSL_UI -

• Message number: 166

• Message text: Internal error while processing the file (error text: '&1')

What causes this issue?

An error has occurred while processing the Microsoft Excel file.
OfficeControl is used to process Microsoft Excel files. OfficeControl
has returne the following error text: '&V1&'. Note: The error text is in
English and cannot be translated).
Another message might be delivered together with this one, also
describing the error.

System Response

The system has stopped processing the file.

How to fix this error?

Correct the error and repeat the activity.

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_UI166 - Details

• The SAP error message RSL_UI166, which indicates an "Internal error while processing the file," typically arises during file processing operations in SAP systems, particularly when dealing with file uploads or downloads. The error text often provides additional context, represented by '&1', which can vary depending on the specific circumstances of the error.
  Possible Causes:
  
  File Format Issues: The file being processed may not conform to the expected format or structure, leading to parsing errors.
  Data Integrity Problems: The data within the file may contain invalid or unexpected values that the system cannot handle.
  System Configuration: There may be configuration issues within the SAP system that affect file processing, such as incorrect settings in the relevant transaction or program.
  Authorization Issues: The user may lack the necessary permissions to access or process the file.
  Temporary System Glitches: Sometimes, internal errors can occur due to temporary issues in the SAP system, such as memory problems or session timeouts.
  
  Solutions:
  
  Check