No portal desktop defined for this user. if this problem persists, contact

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I have two iviews and from one iview I am trying to launch another iview on click of a button and the code which I am using to navigate to the new iview is

String windowFeatures = "toolbar=no;menubar=no;location=no";

String obnURL= "OBN%3A%2F%2FBOSystemAlias%3DVT2100%2FBOTechnicalName%3Dsm.DevelopmentProjectNewX3ZIQXPGVDNSYT1F2EDFXCNLK8.Root%2FOperation%3DDevelopmentProjectDescription";

futil.write(obnURL);

String obnParameter = IOBNConstants.OBJECT_KEY + "%3D" + objectKey; //Übergabe des Objekt Keys

futil.write(" Parameter="+obnParameter);

WDPortalNavigation.navigateAbsolute(obnURL, WDPortalNavigationMode.SHOW_EXTERNAL, windowFeatures, null, WDPortalNavigationHistoryMode.NO_HISTORY, null, null, obnParameter, null, false, true);

and when I run this it gives me an error

No portal desktop defined for this user. if this problem persists, contact.

Can anybody help me in this regard.