Hi @ProSivasP ,

Try after clearing out the tool cache. Usually these errors go away afterwards.

You can clear the cache by removing the contents of “User Directory” of the Developer Studio tool. 
You can see its location using “Help →  About”. 
Copy the location and close the tool.
Go to the location and delete all the files in the folder (or rename it to something else like 10.82_backup).
Restart the tool.
 

Hope this helps.

Kind regards,
Dinushi

Hi Dinushi,

I have tried the steps mentioned by you but its not resolved the issue, still we are getting the same error.

java.lang.ClassCastException: nLjava.lang.Object; cannot be cast to tLjava.lang.String;
    at org.netbeans.modules.plsql.execution.actions.SaveUsedModels.checkUsedModelsToSave(SaveUsedModels.java:212)
    at org.netbeans.modules.plsql.execution.actions.SaveUsedModels.checkSaveUsedModels(SaveUsedModels.java:68)
    at org.netbeans.modules.plsql.execution.actions.GenerateCodeAndDeployAction.getFilesToDeploy(GenerateCodeAndDeployAction.java:168)
    at org.netbeans.modules.plsql.execution.actions.DeployFilesAction.performAction(DeployFilesAction.java:114)
    at org.openide.util.actions.NodeAction$DelegateAction$1.run(NodeAction.java:586)
    at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
    at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
    at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
    at org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:583)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
    at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
    at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
    at java.awt.Component.processMouseEvent(Component.java:6533)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
    at java.awt.Component.processEvent(Component.java:6298)
    at java.awt.Container.processEvent(Container.java:2236)
    at java.awt.Component.dispatchEventImpl(Component.java:4889)
    at java.awt.Container.dispatchEventImpl(Container.java:2294)
    at java.awt.Component.dispatchEvent(Component.java:4711)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
    at java.awt.Container.dispatchEventImpl(Container.java:2280)
    at java.awt.Window.dispatchEventImpl(Window.java:2746)
    at java.awt.Component.dispatchEvent(Component.java:4711)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    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:80)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
acatch] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    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)
 

Hi @ProSivasP ,

Can you update the tool to the latest version and recheck?

Kind regards,

Dinushi

Thank You @Dinushi Liyanage  Issue has been resolved.