We just had a similar incident occur where the client's State data went missing in the middle of efiling - the federal return efiled successfully, but we rec'd an error on the State that the data was missing when we know it was def input. Now the entire client file will not open. It claims no one has Administrator permission when we try opening only on Administrator accounts and use the Run As Administrator option with the program. The Home Base Maintenance does not recognize that it has disappeared, as well. It's as if it's locked, but the error says it doesn't exist.