Close all Excel processes via Task Manager before running the bot, or add a Kill Process activity (“Excel”) at workflow start. Use a 1-2 second Delay after opening Excel scopes for initialization.
Kill Processes: Target “EXCEL.EXE” in a Kill Process activity.
Retry Logic: Wrap Excel scopes in Retry Scope (3 attempts, 2s delay).
Best approach just use kill activity in starting and ending for the excel application.
then use use excel file without desktop excel, disable add‑ins, and avoid parallel excel sessions to prevent this error.
If helpful, mark as solution. Happy automation with UiPath
This usually occurs when Excel is processing something in the background or instance is left open. Recommended best practices to avoid this issue:
Prefer Modern Excel activities (Use Excel File) over Excel Application Scope, as they are more stable and less COM-dependent.
Avoid running multiple workflows or parallel activities on the same Excel file.
Disable Excel Add-ins and ensure no hidden pop-ups or recovery dialogs are blocking Excel.
Always close Excel properly after use and clean up EXCEL.EXE processes if needed.
For non-UI operations, use Workbook activities, which are the most stable option.
Wrap critical Excel actions inside a Retry Scope with small delays to handle transient COM failures.
