500 Internal Server Error for OData model in sapui5

Hi All,

I have an odata webservice which is tested successfully on the browser which returns the metadata. However when i use the url to create an Odata model in my ui5 application in eclipse and run it locally from eclipse , it gives me 500 internal server error in console.

One thing to note is that I am using VPN to access the odata url of the gateway server and I am prefixing my URL with proxy

var oMdl_Article = new sap.ui.model.odata.ODataModel("proxy/http/<ip>:<port>/sap/opu/odata/sap/zarticle_viewer_srv/");