Below are informational messages that can help during debug.
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3596 - BT747 2.X.1788 Build:BT747_mdeweerd.1788.20101005202054859
3596 - Initial: 1018x596  Screen: 1280x800 Final: 1018x596
3597 - Mac OS X
3597 - x86_64
3597 - 10.6.4
3597 - 1.6.0_20
3597 - 64
3597 - Fail javax.swing.plaf.mac.MacLookAndFeel
Fail com.apple.mrj.swing.MacLookAndFeel
Success apple.laf.AquaLookAndFeel
javax.swing.plaf.metal.MetalLookAndFeel
com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel
com.sun.java.swing.plaf.motif.MotifLookAndFeel
com.apple.laf.AquaLookAndFeel

38306 - Classgps.connection.GPSRxTxPort
Error: Port /dev/tty.iBT-GPS-SPPSlaveis currently in use
gnu.io.PortInUseException: Unknown Application
	at gnu.io.CommPortIdentifier.open(CommPortIdentifier.java:467)
	at gps.connection.GPSRxTxPort.openPort(Unknown Source)
	at gps.connection.GPSrxtx.myOpenPort(Unknown Source)
	at gps.connection.GPSrxtx.setFreeTextPortAndOpen(Unknown Source)
	at bt747.model.Controller.openFreeTextPort(Unknown Source)
	at bt747.j2se_view.BT747Main.access$300(Unknown Source)
	at bt747.j2se_view.BT747Main$7.actionPerformed(Unknown Source)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
	at java.awt.Component.processMouseEvent(Component.java:6348)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
	at java.awt.Component.processEvent(Component.java:6113)
	at java.awt.Container.processEvent(Container.java:2085)
	at java.awt.Component.dispatchEventImpl(Component.java:4714)
	at java.awt.Container.dispatchEventImpl(Container.java:2143)
	at java.awt.Component.dispatchEvent(Component.java:4544)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4618)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4282)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4212)
	at java.awt.Container.dispatchEventImpl(Container.java:2129)
	at java.awt.Window.dispatchEventImpl(Window.java:2478)
	at java.awt.Component.dispatchEvent(Component.java:4544)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:635)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
38743 - Port opened