Hi,

I am using Solidworks .net API to traverse a model's parts. But i'm getting 

"Unable to cast COM object of type "Solidworks.Interop.sldworks.sldworksclass" to interface type "Solidworks.Interop.sldworks.Isldworksclass".This operation failed because the QueryInterface call on the COM component for the interface with IID '{83A33D22-27C5-11CE-BFD4-00400513BB57}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)). at System.StubHelpers.StubHelpers.GetCOMIPFromRCW(Object objSrc, IntPtr pCPCMD, IntPtr& ppTarget, Boolean& pfNeedsRelease) at SolidWorks.Interop.sldworks.SldWorksClass.set_UserControl(Boolean Retval).

Below is the code snippet :-

ISldWorks^ swApp;
swApp = gcnew SldWorksClass;
if (!swApp) {
return;
}
swApp->UserControl = true;

Kindly suggest. Thanks in advance