"System.Data.OracleClient requires Oracle client software version 8.1.7 or greater" Oracle Forums Official Download Methods Oracle no longer hosts 8.1.7 on its public Oracle Technology Network (OTN) download pages , which now prioritize versions like 19c, 21c, and 23ai. For Licensed Customers
Some enterprise accounts still have historical entitlements. Visit edelivery.oracle.com, log in, and search for “Oracle 8i.” If your contract includes it, you’ll see the downloadable ISO. For most new accounts, this will return nothing. download oracle client 8.1 7 windows
: Instead of tracking down the 1999-era version, download the latest Oracle Instant Client for Windows (e.g., version 19c or 21c). This often resolves the error. Update Your Provider System.Data.OracleClient "System
Running Oracle Client 8.1.7 on a modern Windows network is a : which now prioritize versions like 19c