Open Record Error?

[Jonghwa Park]

Can't I play the file I used in the previous version which is maybe(2020.04.20).

The record file is made by 1.9.3.9 and replay with 1.9.4.5.

The error message is below:(Widnows10, mac OS 12.1, jdk1.8)

java.io.InvalidClassException: net.sf.robocode.recording.BattleRecordInfo; local class incompatible: stream classdesc serialVersionUID = 1, local class serialVersionUID = 2
        at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:699)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:2028)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1875)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2209)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1692)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:508)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:466)
        at net.sf.robocode.recording.RecordManager.loadRecord(RecordManager.java:188)
        at net.sf.robocode.ui.dialog.MenuBar.battleOpenRecordActionPerformed(MenuBar.java:284)
        at net.sf.robocode.ui.dialog.MenuBar.access$700(MenuBar.java:40)
        at net.sf.robocode.ui.dialog.MenuBar$EventHandler.actionPerformed(MenuBar.java:100)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:882)
        at com.apple.laf.AquaMenuItemUI.doClick(AquaMenuItemUI.java:157)
        at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:926)
        at java.awt.Component.processMouseEvent(Component.java:6539)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
        at java.awt.Component.processEvent(Component.java:6304)
        at java.awt.Container.processEvent(Container.java:2239)
        at java.awt.Component.dispatchEventImpl(Component.java:4889)
        at java.awt.Container.dispatchEventImpl(Container.java:2297)
        at java.awt.Component.dispatchEvent(Component.java:4711)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
        at java.awt.Container.dispatchEventImpl(Container.java:2283)
        at java.awt.Window.dispatchEventImpl(Window.java:2746)
        at java.awt.Component.dispatchEvent(Component.java:4711)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
        at java.awt.EventQueue.access$500(EventQueue.java:97)
        at java.awt.EventQueue$3.run(EventQueue.java:709)
        at java.awt.EventQueue$3.run(EventQueue.java:703)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
        at java.awt.EventQueue$4.run(EventQueue.java:733)
        at java.awt.EventQueue$4.run(EventQueue.java:731)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[fnl]

When it is saved as a "binary" versionwith Java's object  serializer, I would not expect the old recording to work when the serialVersionUID = 1 has changed to serialVersionUID = 2
To preserve this type of compability I recommend to record to XML instead, which is easier to stay compatible with.

But, you can still view it with version 1.9.3.9 at least.