Oracle Proxy Plug-in fails to load on IIS 7.0 with the Error "Calling LoadLibraryEx on ISAPI filter" (Doc ID 1426044.1)

Last updated on JANUARY 31, 2017

Applies to:

Oracle HTTP Server - Version 11.1.1.2.0 to 11.1.1.2.0 [Release Oracle11g]
Microsoft Windows (32-bit)

Symptoms

When trying to configure Oracle Proxy Plug-in (oracle_proxy.dll) to forward requests to Oracle HTTP Server (OHS), the plug-in fails to load into Internet Information Services (IIS) with the following error, when the site is accessed in the browser from the IIS machine.

HTTP Error 500.0 - Internal Server Error
Calling LoadLibraryEx on ISAPI filter "C:\Oracle\oproxy\oracle_proxy.dll" failed


If you have the log_file configured for IIS Proxy Adapter in the Windows Registry there will not be anything written to the log file for this error.

Cause

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