Exception when accessing CSV file.

[fringefilmsoz]

Exception when accessing CSV file.

[fracpete]

What Java version are you using? 16? If so, try using below 16, with 11 recommended.

[fringefilmsoz]

I have a suspicion this is an issue with the CSV file. It has a text field which contained a ' as in O'Brien.

[fracpete]

You can try the unofficial common-csv-weka-package instead of Weka's own CSVLoader for loading that CSV file.

[fringefilmsoz]

@fracpete I've installed. Do i run from simpleCLI like so?

[fracpete]

Personally, I'd use the loader in the Weka Explorer rather than in the SimpleCLI (makes it also easier to tweak options for the loader). The full classname is:

weka.core.converters.CommonCSVLoader <file.csv>

It's possible that you can also use partial classnames (not verified, I don't use the SimpleCLI):

.CommonCSVLoader <file.csv>

[fringefilmsoz]

Continue to receive errors on attempting to import a file.

These are very large files.

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: class javax.swing.plaf.basic.BasicFileChooserUI$AcceptAllFileFilter cannot be cast to class weka.gui.ExtensionFileFilterWithClass (javax.swing.plaf.basic.BasicFileChooserUI$AcceptAllFileFilter is in module java.desktop of loader 'bootstrap'; weka.gui.ExtensionFileFilterWithClass is in unnamed module of loader 'app')
weka.gui.ConverterFileChooser.configureCurrentConverter(ConverterFileChooser.java:743)
weka.gui.ConverterFileChooser.showOpenDialog(ConverterFileChooser.java:553)
weka.gui.explorer.PreprocessPanel.setInstancesFromFileQ(PreprocessPanel.java:1004)
weka.gui.explorer.PreprocessPanel$5.actionPerformed(PreprocessPanel.java:341)
java.desktop/javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
java.desktop/javax.swing.DefaultButtonModel.setPressed(Unknown Source)
java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
java.desktop/java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
java.desktop/java.awt.Component.processMouseEvent(Unknown Source)
java.desktop/javax.swing.JComponent.processMouseEvent(Unknown Source)
java.desktop/java.awt.Component.processEvent(Unknown Source)
java.desktop/java.awt.Container.processEvent(Unknown Source)
java.desktop/java.awt.Component.dispatchEventImpl(Unknown Source)
java.desktop/java.awt.Container.dispatchEventImpl(Unknown Source)
java.desktop/java.awt.Component.dispatchEvent(Unknown Source)
java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
java.desktop/java.awt.Container.dispatchEventImpl(Unknown Source)
java.desktop/java.awt.Window.dispatchEventImpl(Unknown Source)
java.desktop/java.awt.Component.dispatchEvent(Unknown Source)
java.desktop/java.awt.EventQueue.dispatchEventImpl(Unknown Source)
java.desktop/java.awt.EventQueue$4.run(Unknown Source)
java.desktop/java.awt.EventQueue$4.run(Unknown Source)
java.base/java.security.AccessController.doPrivileged(Native Method)
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
java.desktop/java.awt.EventQueue$5.run(Unknown Source)
java.desktop/java.awt.EventQueue$5.run(Unknown Source)
java.base/java.security.AccessController.doPrivileged(Native Method)
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
java.desktop/java.awt.EventQueue.dispatchEvent(Unknown Source)
java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
java.desktop/java.awt.EventDispatchThread.run(Unknown Source)

    at weka.gui.ConverterFileChooser.configureCurrentConverter(ConverterFileChooser.java:743)
    at weka.gui.ConverterFileChooser.showOpenDialog(ConverterFileChooser.java:553)
    at weka.gui.explorer.PreprocessPanel.setInstancesFromFileQ(PreprocessPanel.java:1004)
    at weka.gui.explorer.PreprocessPanel$5.actionPerformed(PreprocessPanel.java:341)
    at java.desktop/javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at java.desktop/javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
    at java.desktop/java.awt.Component.processMouseEvent(Unknown Source)
    at java.desktop/javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.desktop/java.awt.Component.processEvent(Unknown Source)
    at java.desktop/java.awt.Container.processEvent(Unknown Source)
    at java.desktop/java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.desktop/java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.desktop/java.awt.Component.dispatchEvent(Unknown Source)
    at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.desktop/java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.desktop/java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.desktop/java.awt.Component.dispatchEvent(Unknown Source)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
    at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.desktop/java.awt.EventQueue$5.run(Unknown Source)
    at java.desktop/java.awt.EventQueue$5.run(Unknown Source)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.desktop/java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.desktop/java.awt.EventDispatchThread.run(Unknown Source)

[fracpete]

I'm not sure why you are getting the java.lang.ClassCastException. Have you tried using the CSV loader directly from the terminal rather than the GUI? What version of Java are you using? I recommend using 11.

[fringefilmsoz]

I'm using the default Java that comes with the install, which the documentation indicates is JDK 11.

I'll try direct csv loading if i can work out the syntax.