Whensoever, you call, for example, java -cp ../lib/hsqldb.jar org.hsqldb.Server --props ../bin/config/server.properties following exception is thrown: 1[Server@e0e1c6]: [Thread[main,5,main]]: checkRunning(false) entered 2[Server@e0e1c6]: [Thread[main,5,main]]: checkRunning(false) exited 3[Server@e0e1c6]: …