Oracle Application Server (OAS) Error on apachemoduleossl.dll During or After Patch Sets

The issue is actually related to OPatch, the utility to install one-off patches. Patch 5907304 needs to be applied in order to supply 10.1.0.5 networking libraries. This is referred to 10.1.0.5 Bundle 13, and is intended to be automatically installed with the Oracle Application Server 10g Patch Sets. These libraries may have networking objects various other components may use, especially the Oracle HTTP Server when using SSL, and hence the implication with apachemoduleossl.dll.