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The "File Already Exists" error in Lotus Notes appears when trying to create, copy, or save a database file (NSF) with the same name as an existing file. This can happen due to duplicate files, permission issues, or multiple users accessing the same database. To fix it, try renaming or moving the existing file, checking file access settings, or ensuring no one else is modifying the file.

If the issue continues, it may be due to NSF file corruption. In such cases, eSoftTools NSF to PST Converter can help recover emails, contacts, and other data. It allows you to convert NSF files to PST format, making them usable in Outlook while preventing duplication issues.

Guide - Fix Lotus Notes “File Already Exists” Error