วิธีแก้ปัญหา close() was never explicitly called on database คืออะไร?

03-03 16:51:14.880: E/Database(5623): close() was never explicitly called on database '/data/data/com.cs.automatedbus/databases/designho_bustrack'
03-03 16:51:14.880: E/Database(5623): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here