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Some versions, such as "Oracle 8i Client Release 3 v8.1.7," are hosted on the Internet Archive for historical preservation. Compatibility & Modern Alternatives System.Data.OracleClient requires Oracle client 8.1.7 error

Since the 8.1.7 client will corrupt newer Windows registry hives, : download oracle client 8.1 7 windows

So you search. Through Oracle's retired downloads section (login required, support contract needed). Through shady FTP mirrors from 2003. Through ZIP files with "final" in the name, uploaded by sysadmins long retired. You check checksums by candlelight, scan for malware, pray that the 32-bit ODBC driver still registers on Windows 10—or worse, Windows 11. Some versions, such as "Oracle 8i Client Release 3 v8

If you are looking for this specific version because of a .NET error message, note that you . Oracle Client 8.1.7 Install Through shady FTP mirrors from 2003

If you are trying to connect to a modern Oracle database, you should use the Oracle Instant Client , which is free and easy to install: Oracle Instant Client Downloads : Available for Windows 64-bit and 32-bit Installation : Unzip the package to a directory (e.g., C:\oracle\instantclient ) and add that directory to your Windows environment variable you're seeing or finding a compatible driver for your current OS? Oracle Instant Client Downloads