"The index was out of range. It cannot be negative and must be smaller than the collection. Parameter name: index" error message appears when opening Trados Studio

Article Number:000021494 | Last Updated:4/23/2024 12:59 PM

Scope/Environment

Trados Studio

Symptoms/Context

When trying to open Trados Studio you receive the error message:

The index was out of range. It cannot be negative and must be smaller than the collection. Parameter name: index

Resolution

Reset Trados Studio basic settings

Close all RWS applications.
Go to the following folder:
- Trados Studio 2022:
  - Windows 7/8/10: C:\Users\%USERNAME%\AppData\Roaming\Trados\Trados Studio\ rename the Studio17 folder
- Trados Studio 2021:
  - Windows 7/8/10: C:\Users\%USERNAME%\AppData\Roaming\SDL\SDL Trados Studio\ rename the Studio16 folder
- Trados Studio 2019:
  - Windows 7/8/10: C:\Users\%USERNAME%\AppData\Roaming\SDL\SDL Trados Studio\ rename the 15.0.0.0 folder
NOTE: If you do not find this folder, make sure that these files are not hidden. See KB article Showing hidden files, folders and extensions on Windows operating systems
Restart Trados Studio.

Root Cause

Corrupted files in the installation folder of Trados Studio.

Reference

Send Article Feedback