Is there anyway to add ITable to ArcMap TOC? I'm trying to edit a table which is added through WorkspaceFactory.OpenFromFile. But I get the error "Error HRESULT E_FAIL has been returned from a call to a COM component", see the code below. I found out that if I add a featurelayer along with the table and add the featurelayer to TOC, I don't get the error. Any suggestions? IWorkspaceFactory pWorkspaceFactory = new SdeWorkspaceFactory(); IWorkspace workspace = pWorkspaceFactory.OpenFromFile(path, 0); IPropertySet propSet = workspace.ConnectionProperties; IFeatureWorkspace pWorkspace = pWorkspaceFactory.Open(propSet, 0) as IFeatureWorkspace; ITable table = pWorkspace.OpenTable("GISLCSA.GISEDITOR.MetaID"); ILayer tableLayer = table as ILayer; pMetaIDTable = table as ITable; UID uid = new UIDClass(); uid.Value = "esriEditor.Editor"; IEditor editor = m_application.FindExtensionByCLSID(uid) as IEditor; if (editor.EditState == esriEditState.esriStateNotEditing) { try { editor.StartEditing(workspace ); } catch (Exception e) { MessageBox.Show(e.Message); } }