When the NetScaler version which is less than 12.0.57.19 but the plugin version is 12.0.57.19 or higher, and if EPA is configured in this scenario, the pluginlist.xml structure mismatch occurs and the plugin is unable to capture it.

To workaround this, modify the pluginlist.xml file as noted in the following procedure:

1. Navigate to /var/netscaler/gui/vpn, open pluginlist.xml file.

2. The file contains a series of plugin nodes.

3. Add the following plugin-node in the file:

   <plugin
    name="EPA scanning Engine (Opswat) for Windows" 
    type="WIN-EPA-ENGINE" 
    version="1.1.2.2" 
    path="/epa/scripts/win/epaPackage.exe" 
    opswatVersion="4.2.1400.0"
   />

   Note: The version in above node should be taken from – /netscaler/ns_gui/epa/version.xml

4. The newer file should now contain 6 nodes rather than 5 nodes which was present earlier.

5. Repeat the same process for /netscaler/ns_gui/vpn/pluginlist.xml file.

6. Wait for 3-4 minutes for changes to be done.