| Check | Action | |-------|--------| | | Delphi 7 generates 32-bit executables only. Use 32-bit OpenSSL DLLs. 64-bit DLLs will never load. | | DLL dependencies | Use Dependency Walker (or Dependencies on modern Windows) on libeay32.dll . Does it require MSVCR70.dll or MSVCRT.dll that is missing? | | Path precedence | Indy loads DLLs in this order: Application directory → System32 → PATH. Ensure no older, incompatible DLLs are in System32. | | Antivirus interference | Some antivirus software quarantines or blocks OpenSSL DLLs. Temporarily disable to test. | | Server-side protocol | Use openssl s_client command line to check: openssl s_client -connect example.com:443 -tls1_2 . If the server rejects TLS 1.0/1.1, even correct DLLs won’t help. | | Indy initialization order | Ensure IdSSLIOHandlerSocketOpenSSL is assigned to TIdHTTP.IOHandler and SSLOptions.Method is set to a method supported by both DLLs and server (e.g., sslvTLSv1_2 if patched). |
If you control the server, downgrade to TLS 1.0/1.1 for legacy clients (security risk). If not, you cannot avoid upgrading to a modern Delphi (10.x, 11, 12) or wrapping your Indy 9 app with : a local proxy that accepts plain TCP and upgrades to TLS 1.2 to the real server. Delphi 7 Indy 9 Could Not Load Ssl Library
For Indy 9, you cannot use standard OpenSSL builds. You must use a "special build" specifically intended for legacy Indy versions. | Check | Action | |-------|--------| | |
The required DLLs are not in the application's search path (usually the same folder as your .exe ). | | DLL dependencies | Use Dependency Walker