Data Adapter and/or DataSet disappear

If the data adapter or the dataset disappears the developer must reestablish the connection or create a new project. First delete the connection and any adapters or datasets that are still available then create a new connection with the new adapters. Once the adapter is created, generate the dataset.

If recreating the connection and data adapter with the dataset does not work then create a new project. Move the form from the old project to the new project but be sure to delete the connection and any data adapters and datasets before doing so. Make a new connection and data adapter, then generate a new dataset. It should work, now!