Refering to Client Plugin SDK and Sample, I built a simple homeview plugin, it is loaded, and events fire as intended. But it also throws a strange error --"Error" :bject reference not set to an instance of an object.". Can someone help why ?

public class Plugin2 : Plugin {

public VIApp _viApp;

public void Load(VIApp app) {

// Test Loading

if (app == null) { throw new Exception("Plugin.Load() viApp is null.\nPlugin load failed"); }

_viApp = app;

// Test Menu

Extension ext = _viApp.NewExtension();

ext.Name = "PowerCLI";

ext.Activated += new ExtensionEvent(ext_Activated);

ext.Image = Properties.Resources.PowerCLI1;

_viApp.AddExtension("HomeView.Applications", ext);

}

void ext_Activated(Extension sender) {

try {

System.Windows.Forms.MessageBox.Show("hi");

} catch { }

}

public void Unload() {

//_viApp = null;

}

}

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