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Exception running Moka example [message #1744051]

Wed, 21 September 2016 18:52

Stephen Blackwell is currently offline

Stephen Blackwell

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Messages: 138
Registered: March 2014

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First off, a big "Thank you" to Géry Deloge et al for the tutorial (https://wiki.eclipse.org/Papyrus/UserGuide/ModelExecution)

I was following along but I got a Java NullPointerException when pressing debug in the "Starting an execution with a launch configuration" section.
I have attached an image of the event details.
index.php/fa/27160/0/

index.php/fa/27160/0/

I noticed one difference from the tutorial and that is that the New_Configuration window has an extra field. I have also attached an image of that window.
index.php/fa/27159/0/

index.php/fa/27159/0/

Attachment: Moka_Config.PNG
(Size: 47.67KB, Downloaded 926 times)
Attachment: Moka_error.PNG
(Size: 68.90KB, Downloaded 1062 times)

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Re: Exception running Moka example [message #1744111 is a reply to message #1744051]

Thu, 22 September 2016 12:08

Jeremie Tatibouet is currently offline

Jeremie Tatibouet

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Messages: 10
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Hi Stephen -

In order to make the example to run it is required that you specify the execution engine used to perform the actual interpretation

In your case you can either use oep.moka.fuml or oep.moka.composites which are respectively implementations of Foundational UML and Composite Structures semantics.

In addition, the element to be executed must be the Increment_Factory behavior that is generated for the Increment class. The process to generate this behavior is:

Right click on the Increment class
Select Moka Menu
Select modeling utils
Click on generate factory

After these small adjustments you should be able to run the example. If not feel free to contact us.

Bests

Jérémie

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Re: Exception running Moka example [message #1744117 is a reply to message #1744111]

Thu, 22 September 2016 13:17

Stephen Blackwell is currently offline

Stephen Blackwell

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Messages: 138
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Jérémie,

I had already done this - in the "Your first executable model" section of your tutorial but I did it again for good measure.
I got the same exception as before.

Let me know if there are any other checks I can run to help debug this.

Thanks,
Steve

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Re: Exception running Moka example [message #1744319 is a reply to message #1744117]

Sun, 25 September 2016 06:58

Klaas Gadeyne is currently offline

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Hmm, this looks like https://bugs.eclipse.org/bugs/show_bug.cgi?id=471564 which I closed because I couldn't reproduce it using a later version.

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Re: Exception running Moka example [message #1744402 is a reply to message #1744319]

Mon, 26 September 2016 14:21

Stephen Blackwell is currently offline

Stephen Blackwell

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Messages: 138
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It does.

I would guess that the tutorial is missing a step that changes a preference or an environment variable that is a default on your machine.
Let me know if I can help.

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Re: Exception running Moka example [message #1744723 is a reply to message #1744402]

Thu, 29 September 2016 16:31

Stephen Blackwell is currently offline

Stephen Blackwell

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Messages: 138
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Klaas, Jérémie,

So where do we go from here?
Is anyone looking in to this? Do you want me to re-open the old bug? Write a new one?

Or am I just stuck with Moka being inop. for me and I should just drop it?

Thanks,
Steve

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Re: Exception running Moka example [message #1744819 is a reply to message #1744051]

Fri, 30 September 2016 13:52

Stephen Blackwell is currently offline

Stephen Blackwell

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Messages: 138
Registered: March 2014

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I ran a "Check for Updates" this morning (Sep 30, 9:30am EDT) and got this Moka error:

index.php/fa/27265/0/

index.php/fa/27265/0/

Is this related to this issue?

Steve

Attachment: Moka_update.PNG
(Size: 32.82KB, Downloaded 825 times)

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Re: Exception running Moka example [message #1744820 is a reply to message #1744051]

Fri, 30 September 2016 13:53

Stephen Blackwell is currently offline

Stephen Blackwell

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Messages: 138
Registered: March 2014

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I ran a "Check for Updates" this morning (Sep 30, 9:30am EDT) and got this Moka error:

index.php/fa/27265/0/

index.php/fa/27265/0/

Is this related to this issue?

Steve

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Re: Exception running Moka example [message #1744858 is a reply to message #1744820]

Fri, 30 September 2016 20:26

Klaas Gadeyne is currently offline

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Hi,

I tried to reproduce the above issue, but ran into https://bugs.eclipse.org/bugs/show_bug.cgi?id=502968

2b continued...

Klaas

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Re: Exception running Moka example [message #1744859 is a reply to message #1744820]

Fri, 30 September 2016 20:27

Klaas Gadeyne is currently offline

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Messages: 165
Registered: July 2009

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Hi,

I tried to reproduce the above issue, but ran into https://bugs.eclipse.org/bugs/show_bug.cgi?id=502968

2b continued...

Klaas

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Re: Exception running Moka example [message #1744950 is a reply to message #1744051]

Mon, 03 October 2016 09:29

Klaas Gadeyne is currently offline

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Registered: July 2009

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Hi Stephen,

Meanwhile Benoit fixed the bug, and I found the cause of your problem.
In the screenshot below, you forgot to set (actually modify) the 'element to be executed' to the generated factory, iso. the classifierbehaviour.

Still, it is at least very 'user-unfriendly' to generate an un-understandable exception if the wrong element is selected, especially since the field is filled by default, so I'll re-open the bug.

HTH,

Klaas

Stephen Blackwell wrote on Wed, 21 September 2016 14:52

First off, a big "Thank you" to Géry Deloge et al for the tutorial (https://wiki.eclipse.org/Papyrus/UserGuide/ModelExecution)

I was following along but I got a Java NullPointerException when pressing debug in the "Starting an execution with a launch configuration" section.
I have attached an image of the event details.

I noticed one difference from the tutorial and that is that the New_Configuration window has an extra field. I have also attached an image of that window.

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Re: Exception running Moka example [message #1744979 is a reply to message #1744950]

Mon, 03 October 2016 17:40

Stephen Blackwell is currently offline

Stephen Blackwell

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Messages: 138
Registered: March 2014

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Hi Klaas,

OK, that was the problem. The animation is working now.
I hope I'm not being rude here but I would be happy to help with the wording in the example. I guessing that English is not Jérémie's first language.

I curious about the order of the animation, specifically on the incrementMethod activity diagram. What I see is this:

First the "This" node animates, then the output pin, the control flow and the fork node.
Next the control flow to the "read counter" input pin then the "read counter" node, the "read counter" output pin and control flow to the "add" x input pin.
After that is the control flow from the fork to the "set counter" object input pin.
Then the "1" node, the "1" output pin.
etc, etc

I would have though that the "This" and the "1" node would have animated at the same time followed by their respective output nodes at the same time and then the output flows etc, etc.

So how is the animation ordering determined?

Thanks,
Steve

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Re: Exception running Moka example [message #1746913 is a reply to message #1744979]

Mon, 07 November 2016 16:00

Bruno Costa is currently offline

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Messages: 15
Registered: November 2014

Junior Member

Dear guys,

I had the same problem, but with the help of this thread I could solve them Smile

Smile

However, I still can't see the variables in the variables panel. Could you guys see the variables and value of the count property change?

Attachment: VariablesPanel.png
(Size: 15.13KB, Downloaded 162 times)

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Re: Exception running Moka example [message #1747996 is a reply to message #1746913]

Thu, 17 November 2016 14:20

Arnaud Cuccuru is currently offline

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Hi Bruno,

To see the variables in the panel, the execution has to be suspended. This can be done by pressing the "pause" button, or by putting a breakpoint on a node or vertex in the activity.

Arnaud

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Re: Exception running Moka example [message #1748073 is a reply to message #1744979]

Fri, 18 November 2016 10:46

Arnaud Cuccuru is currently offline

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Messages: 34
Registered: April 2010

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Hi Stephen,

The ordering of animation follows the order in which nodes are executed by the execution engine. And the execution engine complies with the fUML specification. So, the execution order that you see with the animation is legal.

Arnaud

[Updated on: Fri, 18 November 2016 11:36]

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