If Adding a Resource Results in an Error

Whether adding a resource is possible depends on what is currently displayed in the design panel.

If you try to add a resource that cannot be added to the current resource, an error results.

For example, if the root folder is displayed in the design panel, you can add an adapter instance. If any other resource is displayed, you cannot add the adapter instance.

Note: Ideally, all resources that cannot be dragged into the design panel should be grayed out (palette mode) or not visible (non-palette mode). For some custom palettes that may not always be true.