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SessionConnectionKeepAlive: Argument sql cannot be null
java.lang.IllegalArgumentException: SessionConnectionKeepAlive: Argument sql cannot be null	at net.sourceforge.squirrel_sql.fw.util.Utilities.checkNull(Utilities.java:464)	at net.sourceforge.squirrel_sql.client.session.SessionConnectionKeepAlive.(SessionConnectionKeepAlive.java:55)	at net.sourceforge.squirrel_sql.client.session.Session.startKeepAliveTaskIfNecessary(Session.java:249)	at net.sourceforge.squirrel_sql.client.session.Session.(Session.java:239)	at net.sourceforge.squirrel_sql.client.session.SessionManager.createSession(SessionManager.java:134)	at net.sourceforge.squirrel_sql.client.mainframe.action.ConnectToAliasCommand$SheetHandler.createSession(ConnectToAliasCommand.java:366)	at net.sourceforge.squirrel_sql.client.mainframe.action.ConnectToAliasCommand$SheetHandler.afterExecuteFinished(ConnectToAliasCommand.java:331)	at net.sourceforge.squirrel_sql.client.mainframe.action.ConnectToAliasCommand$SheetHandler.access$200(ConnectToAliasCommand.java:156)	at net.sourceforge.squirrel_sql.client.mainframe.action.ConnectToAliasCommand$SheetHandler$1.openConnectionFinished(ConnectToAliasCommand.java:282)	at net.sourceforge.squirrel_sql.client.mainframe.action.OpenConnectionCommand$3.run(OpenConnectionCommand.java:143)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)	at java.awt.EventQueue.access$200(EventQueue.java:103)	at java.awt.EventQueue$3.run(EventQueue.java:688)	at java.awt.EventQueue$3.run(EventQueue.java:686)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)	at net.sourceforge.squirrel_sql.client.Main$1.dispatchEvent(Main.java:99)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)