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hi all

I am trying to simulate the cantilever without any symmetry condition as i would like to later modify the structure by adding a few more elements.I am getting the following error

anyone knows why this is happening.
Exception:
com.femlab.jni.FlNativeException: Failed to evaluate expression
Messages:
Failed to evaluate expression
- Expression: V

Failed to evaluate variable
- Variable: V
- Geometry: 1
- Boundary: 10

Undefined post expression

X plot failed.#Boundary

Stack trace:
at evaltree.cpp, row 866, ()
at xevalutil.cpp, row 2612, ()
at xmodel_post.cpp, row 810, ()
at com.femlab.xmesh.Xmesh.postEval(Native Method)
at com.femlab.xmesh.Xmesh.postEval(Unknown Source)
at com.femlab.post.PostServer.a(Unknown Source)
at com.femlab.post.PostPlot.elemPlot(Unknown Source)
at com.femlab.post.PlotCmdData.a(Unknown Source)
at com.femlab.commands.PlotCommand.evalOnServer(Unknown Source)
at com.femlab.commands.FlCommand.runServerCode(Unknown Source)
at com.femlab.server.ServerProxy.eval(Unknown Source)
at com.femlab.commands.FlCommand.a(Unknown Source)
at com.femlab.commands.FlCommand.eval(Unknown Source)
at com.femlab.commands.a.a(Unknown Source)
at com.femlab.post.PlotType.a(Unknown Source)
at com.femlab.post.PostModelMph.a(Unknown Source)
at com.femlab.view.c.a(Unknown Source)
at com.femlab.gui.PostMode.a(Unknown Source)
at com.femlab.gui.GuiMode.j(Unknown Source)
at com.femlab.gui.au.a(Unknown Source)
at com.femlab.gui.au.b(Unknown Source)
at com.femlab.api.client.w.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at com.femlab.gui.e.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.Dialog$1.run(Unknown Source)
at java.awt.Dialog$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Unknown Source)
at com.femlab.controls.FlDialog.showAsDialog(Unknown Source)
at com.femlab.controls.FlDialog.show(Unknown Source)
at com.femlab.controls.FlModalDialog.show(Unknown Source)
at com.femlab.gui.dialogs.z.run(Unknown Source)
at com.femlab.util.x.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at com.femlab.gui.e.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)