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failed to create a view [message #658128]

Sun, 06 March 2011 20:17

Elhamlaoui Mahmoud

Messages: 268
Registered: March 2010

Senior Member

Hi,

I have a prolblem that i couldnt figure out its cause,i got the following exception :

Quote:

org.eclipse.core.commands.ExecutionException: While executing the operation, an exception occurred
at org.eclipse.core.commands.operations.DefaultOperationHistory .execute(DefaultOperationHistory.java:519)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramCommandStack .execute(DiagramCommandStack.java:205) ...
Caused by: org.eclipse.jface.util.Assert$AssertionFailedException: null argument;failed to create a view

any ideas
thanks

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Re: failed to create a view [message #658202 is a reply to message #658128]

Mon, 07 March 2011 11:58

Michael Golubev

Messages: 383
Registered: July 2009

Senior Member

Hello,

Its very specific to your context.

I would start to debug with breakpoint at the generated XXXViewProvider#protected boolean provides(CreateNodeViewOperation op).

Unfortunately this is being called a lot of times, so I would disable it until the interesting call to ViewService is actually made.

Regards,
Michael

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Re: failed to create a view [message #658293 is a reply to message #658202]

Mon, 07 March 2011 17:48

Elhamlaoui Mahmoud

Messages: 268
Registered: March 2010

Senior Member

Hi Michael,

thanks for the hint i will try to debug on provides(CreateNodeViewOperation op) method and see what's going on.

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Re: failed to create a view [message #658905 is a reply to message #658293]

Thu, 10 March 2011 11:28

Elhamlaoui Mahmoud

Messages: 268
Registered: March 2010

Senior Member

Hi,
I found a solution in the link below, may be it could help someone :

http://www.jevon.org/wiki/Having_Multiple_Containments_of_th e_Same_Domain_Element_in_GMF

[Updated on: Thu, 10 March 2011 11:28]

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Re: failed to create a view [message #814459 is a reply to message #658905]

Tue, 06 March 2012 13:30

Zlatka Manas

Messages: 26
Registered: March 2012

Junior Member

Hi,
I am trying to fix this error as well. I get the error when trying to draw a process. I don't get an element on the canvas. If I try to draw a cluster I get two cluster elements. I have this:

Top Node: instance:Instance/Cluster
Node Ref. : Instance/Cluster
Top Node: instance:Instance/Process
Node Ref. : Instance/Process

Instance class has a classDefinition which contains the details for a class (Cluster or Process).
I tried to fix it by following the link in the previous post, but which name do I specify in the following:
return domainElement.eContainingFeature().getName().equals("????"); Instance goes for both elements. If OCL is better for this case what would the constraint be? How to distinguish between the instances?

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