Trouble Running AddPathSpring.py Script

[Colin Holtkamp]

Hi, I am new to open sim and currently running through the intermediate tutorial "Simulation-Based Design to Reduce Metabolic Cost". I am Trying to run the pre-downloaded script "AddPatchSpring.py" In order to create a new model with a biarticular spring. I am not very familiar with scripting. I am getting the following error:

java.io.IOException: Failed to connect Socket 'parent_frame' of type PhysicalFrame (details: Component 'walk_subject01_ankle_spring_path_spring' could not find '/forceset/BiarticularSpringDamper/bodyset/femur_r' of type PhysicalFrame. Make sure a component exists at this path and that it is of the correct type.
Thrown at Component.h:764 in getComponent().).
In Object 'med_gas_r-P1' of type PathPoint.
Thrown at Component.cpp:312 in finalizeConnections().
at org.opensim.modeling.opensimSimulationJNI.Model_initSystem(Native Method)
at org.opensim.modeling.Model.initSystem(Model.java:848)
at org.opensim.view.pub.OpenSimDB.addModel(OpenSimDB.java:146)
at org.opensim.view.pub.OpenSimDB.addModel(OpenSimDB.java:141)
[catch] at org.opensim.console.gui.loadModel(gui.java:194)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186)
at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:204)
at org.python.core.PyObject.__call__(PyObject.java:387)
at org.python.core.PyObject.__call__(PyObject.java:391)
at org.python.pycode._pyx16.f$0(/Users/colinholtkamp/Documents/OpenSim/4.0/Models/Gait10dof18musc/Scripts/addPathSpring.py:48)
at org.python.pycode._pyx16.call_function(/Users/colinholtkamp/Documents/OpenSim/4.0/Models/Gait10dof18musc/Scripts/addPathSpring.py)
at org.python.core.PyTableCode.call(PyTableCode.java:165)
at org.python.core.PyCode.call(PyCode.java:18)
at org.python.core.Py.runCode(Py.java:1261)
at org.python.core.__builtin__.execfile_flags(__builtin__.java:522)
at org.python.util.PythonInterpreter.execfile(PythonInterpreter.java:225)
at org.opensim.console.JConsole.executeFile(JConsole.java:167)
at org.opensim.console.ScriptsRunBrowseAction.performAction(ScriptsRunBrowseAction.java:46)
at org.openide.util.actions.CallableSystemAction$1.run(CallableSystemAction.java:130)
at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
at org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:127)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$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 com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:125)
at java.awt.MenuItem.processActionEvent(MenuItem.java:669)
at java.awt.MenuItem.processEvent(MenuItem.java:628)
at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:357)
at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:345)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:761)
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)
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)

As I stated earlier, I am new to scripting and I really don't know how to verify if the "Component exists at the given path." Could anyone tell me how to resolve this issue? Thanks

Colin Holtkamp

[jimmy d]

Hi, Colin-

This is an existing bug that we hope to fix in the next release. The issue can be found here.

Unfortunately, there isn't much that can be done to work around the issue, I will update this thread when it is fixed and the next release is out.

Thanks,
-James

[Colin Holtkamp]

Ok Great! Thanks James!

Colin Holtkamp