[kepler-users] Problem with MatlabExpression

[Daniel Crawl]

Hi Bill,

The Matlab actor in Kepler 2.4 has a bug that prevents more than
one instance from being added to the canvas. This has been fixed
in Kepler svn and you get can this version by running:

mkdir kepler.modules
cd kepler.modules
svn co https://code.kepler-project.org/code/kepler/trunk/modules/build-area
cd build-area
ant change-to -Dsuite=kepler
ant run

Documentation about getting Kepler from svn can be found here:

https://kepler-project.org/developers/teams/build/systems/build-system/extension-build-system

   --dan


On 3/24/15 8:00 AM, William Hunt wrote:
> I'm having some problems getting the MatlabExpression actor to work in
> Kepler.  I am running the latest version of Kepler, downloaded
> yesterday, and I did the module upgrades recommended when I first ran
> the program.    I am running on a Mac with OS X version 10.10.2., with
> Matlab R2015a installed.  I believe I have followed the instructions for
> setting the environment variable required by the MatlabExpression actor,
> and I am able to run the MatlabExpression Demo supplied, which would
> think indicates the configuration is ok.  However, if I create a new
> workflow, and add a MatlabExpression actor to it, I get an error dialog
> box.  I've copied the text of the dialog, as well as the associated
> stack trace and console output at the end of the email.
>
> I get the same behaviour if I restart Kepler, and attempt to add two
> MatlabExpression actors to a new workspace - the first one seems to add
> ok, but the second gives the same error.  If I delete the first actor,
> any subsequent attempts to add a MatlabExpresion actor fail in the same
> way, even if a new workflow has been created.
>
> Is this a bug, or am I doing something wrong ?  Should I be able to add
> two MatlabExpression actors ?
>
> Thanks,
>
> Bill
>
> Text of error dialog :
>
> *Change Failed  Cannot create entity without class name. In [external
> stream]  at line 2 and column 26*
>
> If I click the Display Stack Trace button on the dialog, I get this :
>
> com.microstar.xml.XmlException: Cannot create entity without a class
> name. in [external stream] at line 2 and column 26
> at ptolemy.moml.MoMLParser._checkForNull(MoMLParser.java:4013)
> at ptolemy.moml.MoMLParser._createEntity(MoMLParser.java:4194)
> at ptolemy.moml.MoMLParser.startElement(MoMLParser.java:2697)
> at com.microstar.xml.XmlParser.parseElement(XmlParser.java:921)
> at com.microstar.xml.XmlParser.parseContent(XmlParser.java:1104)
> at com.microstar.xml.XmlParser.parseElement(XmlParser.java:924)
> at com.microstar.xml.XmlParser.parseDocument(XmlParser.java:481)
> at com.microstar.xml.XmlParser.doParse(XmlParser.java:159)
> at com.microstar.xml.XmlParser.parse(XmlParser.java:132)
> at ptolemy.moml.MoMLParser.parse(MoMLParser.java:1540)
> at ptolemy.moml.MoMLParser.parse(MoMLParser.java:1512)
> at ptolemy.moml.MoMLParser.parse(MoMLParser.java:1668)
> at ptolemy.moml.MoMLChangeRequest._execute(MoMLChangeRequest.java:289)
> at ptolemy.kernel.util.ChangeRequest.execute(ChangeRequest.java:171)
> at ptolemy.kernel.util.NamedObj._executeChangeRequests(NamedObj.java:2559)
> at ptolemy.kernel.util.NamedObj.executeChangeRequests(NamedObj.java:725)
> at ptolemy.kernel.util.NamedObj.requestChange(NamedObj.java:1776)
> at ptolemy.actor.CompositeActor.requestChange(CompositeActor.java:1957)
> at
> ptolemy.vergil.basic.EditorDropTargetListener.drop(EditorDropTargetListener.java:394)
> at java.awt.dnd.DropTarget.drop(DropTarget.java:434)
> at
> sun.awt.dnd.SunDropTargetContextPeer.processDropMessage(SunDropTargetContextPeer.java:519)
> at
> sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchDropEvent(SunDropTargetContextPeer.java:832)
> at
> sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent(SunDropTargetContextPeer.java:756)
> at sun.awt.dnd.SunDropTargetEvent.dispatch(SunDropTargetEvent.java:30)
> at java.awt.Component.dispatchEventImpl(Component.java:4633)
> at java.awt.Container.dispatchEventImpl(Container.java:2142)
> at java.awt.Component.dispatchEvent(Component.java:4604)
> at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4618)
> at
> java.awt.LightweightDispatcher.processDropTargetEvent(Container.java:4353)
> at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4204)
> at java.awt.Container.dispatchEventImpl(Container.java:2128)
> at java.awt.Window.dispatchEventImpl(Window.java:2492)
> at java.awt.Component.dispatchEvent(Component.java:4604)
> at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:717)
> at java.awt.EventQueue.access$400(EventQueue.java:82)
> at java.awt.EventQueue$2.run(EventQueue.java:676)
> at java.awt.EventQueue$2.run(EventQueue.java:674)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
> at
> java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:97)
> at java.awt.EventQueue$3.run(EventQueue.java:690)
> at java.awt.EventQueue$3.run(EventQueue.java:688)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
> at java.awt.EventQueue.dispatchEvent(EventQueue.java:687)
> at
> java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
> at
> java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
> at
> java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
> at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
>
> Also, the following lines are printed in the console :
>
>       [null] Error inside GetMomlFromLSID.getMoml(): Failed to set
> _iteration to 1: ptolemy.kernel.util.NameDuplicationException: Attempt
> to insert object named "iteration" into a container that already
> contains an object with that name.
>
>       [null] Error creating alternateGetMoml!
>
>
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