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java.lang.NullPointerException: 	at org.hsqldb.scriptio.ScriptWriterText.writeLogStatement(Unknown Source)	at org.hsqldb.persist.Log.writeStatement(Unknown Source)	at org.hsqldb.persist.Logger.writeToLog(Unknown Source)	at org.hsqldb.Session.close(Unknown Source)	at org.hsqldb.Session.execute(Unknown Source)	at org.hsqldb.ServerConnection.run(Unknown Source)	at java.lang.Thread.run(Thread.java:492)