java.lang.IllegalArgumentException: SessionConnectionKeepAlive: Argument sql cannot be null

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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)

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