The "Entry Not Found in Index" error in Lotus Notes typically appears when the database index is damaged or missing, preventing users from searching or accessing emails properly. This can happen due to an abrupt system crash, improper database shutdown, or corruption in the NSF file. To fix this issue, users can try rebuilding the database index by pressing Shift+F9, refreshing the workspace, or using the Fixup and Compact commands.
If these manual solutions don’t work, the safest way to recover missing emails is by using eSoftTools NSF to PST Converter Software. This tool can scan the damaged NSF database, repair index errors, and export all emails and mailbox items into a readable format like PST, EML, or MBOX. With its advanced recovery engine, you can restore even permanently deleted emails without modifying the original data.