> We get this error only in one of our users PC with office 2003 we tried re
> Reinstalling the Office 2003 Primary InterOp Assemblies also. Why should
> this happen in only one users desktop when we have this add-in running on
> 100 of other workstation ?
>
> Microsoft.Office.Interop.Outlook.Application oApplication = null;
>
> try
>
> {
>
> comboBox_Folder.Items.Clear();
>
> Type oType = Type.GetTypeFromProgID("Outlook.Application");
>
> if (oType != null)
>
> oApplication =
> (Microsoft.Office.Interop.Outlook.Application)Activator.CreateInstance(oType);
>
>
>
> Unable to cast object of type 'System.__ComObject' to type
> 'Microsoft.Office.Interop.Outlook.ApplicationClass'.
> at
> System.Runtime.Remoting.RemotingServices.AllocateUninitializedObject(RuntimeType
> objectType)
> at
> System.Runtime.Remoting.RemotingServices.AllocateUninitializedObject(Type
> objectType)
> at
> System.Runtime.Remoting.Activation.ActivationServices.CreateInstance(Type
> serverType)
> at
> System.Runtime.Remoting.Activation.ActivationServices.IsCurrentContextOK(Type
> serverType, Object[] props, Boolean bNewObj)
> at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean
> publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle&
> ctor, Boolean& bNeedSecurityCheck)
> at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean
> fillCache)
> at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean
> skipVisibilityChecks, Boolean fillCache)
> at System.Activator.CreateInstance(Type type, Boolean nonPublic)
>
> TIA
> John
>