Why does SQLite throw InvalidOperationException in Unity 5.3?

Hello,

I am having a little issue trying to use SQLite in Unity 5.3. I have been following the SQLite setup provided here (http://answers.unity3d.com/questions/743400/database-sqlite-setup-for-unity.html) and I have tried to open a sqlite database with the following code:

     void Start()
     {
             string conn = "URI=file:" + Application.dataPath 
                 + "/trajectoriesDB"; //Path to database.
     
             IDbConnection dbconn;
             dbconn = (IDbConnection) new SqliteConnection(conn);
             dbconn.Open();
             Debug.Log("Database open");
     
             dbconn.Close();
             dbconn = null;
     }

The problem is that, when the program reaches the line dbconn.Open();, Unity throws the following exception:

InvalidOperationException: Cannot set CommandText while a DataReader is active

I tested in a very simple scene where only this script is running, and I have also double checked that I have all the .dll I need in Assets/Plugins and the database file in Assets/.

I cannot find the root of this problem, since I do not have any DataReader in my code. Has anyone experienced the same problem before?

Thank you in advance!