Details
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    Type:Bug 
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    Status: In Progress
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    Priority:Minor 
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    Resolution: Unresolved
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    Affects Version/s: 2.10.1
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    Fix Version/s: None
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    Component/s: jvdesktop
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    Labels:None
Description
                    Occasionally see a failure to add a new frame to the Desktop:
java.lang.IllegalArgumentException: illegal component position
at java.awt.Container.addImpl(Container.java:1087)
at javax.swing.JLayeredPane.addImpl(JLayeredPane.java:231)
at javax.swing.JDesktopPane.addImpl(JDesktopPane.java:484)
at java.awt.Container.add(Container.java:417)
at jalview.gui.Desktop.addInternalFrame(Desktop.java:887)
java.lang.IllegalArgumentException: illegal component position
at java.awt.Container.addImpl(Container.java:1087)
at javax.swing.JLayeredPane.addImpl(JLayeredPane.java:231)
at javax.swing.JDesktopPane.addImpl(JDesktopPane.java:484)
at java.awt.Container.add(Container.java:417)
at jalview.gui.Desktop.addInternalFrame(Desktop.java:887)