TopBraid v5.1.4.v201606 not working on Linux

[xerao]

I am trying to run: TopBraid Composer Free Edition v5.1.4.v201606   on Ubuntu Linux 16.x with Java 8 installed.

I cannot double click on any of the classes, or create subclasses etc and clicking on the "add" button for creating a subclass does not do anything.  I get the following errors in the console.

*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug

*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug

[TopBraid Error] 2016-07-25T11:42:36+0100 - org.topbraidcomposer.core: Failed to execute operation (null)
java.lang.reflect.InvocationTargetException
    at org.topbraid.core.change.AbstractChangeEngine.execute(AbstractChangeEngine.java:286)
    at org.topbraidcomposer.core.change.TBCChangeEngine.access$0(TBCChangeEngine.java:1)
    at org.topbraidcomposer.core.change.TBCChangeEngine$2.run(TBCChangeEngine.java:155)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
Caused by: org.eclipse.core.commands.ExecutionException: While executing the operation, an exception occurred
    at org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:524)
    at org.topbraid.core.change.AbstractChangeEngine.execute(AbstractChangeEngine.java:272)
    ... 3 more
Caused by: java.lang.NullPointerException
    at org.topbraidcomposer.navigation.subclassestree.createclasses.CreateClassesDialog$1.execute(CreateClassesDialog.java:125)
    at org.topbraid.core.change.ChangeOperation.execute(ChangeOperation.java:105)
    at org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:516)
    ... 4 more


Any way to resolve this problem?

Cheers

[Pat Doyle]

Hello,

TopBraid Composer requires Oracle Java 8 in order to run correctly.  OpenJDK 8 is the default java installation in Ubuntu 16.x - did you go through the process of manually installing Oracle Java 8 and setting it as the default JRE?  If not - this is likely the cause of the problems you are seeing.  

It should be noted that Oracle Java 8 is not officially listed as supported in Ubuntu 16.x, so if you're seeing the issues with Oracle Java 8, this could be why.  You can find a list of officially supported Oracle Java 8 platforms here:

http://www.oracle.com/technetwork/java/javase/certconfig-2095354.html

Hope it helps. 

[xerao]

Hello Pat,

I did install Oracle Java 8  which is compatible with Ubuntu 16.x and removed all other versions. It still does not work.

Regards

[Richard Cyganiak]

Hi xerao,

Does this only affect the Classes view on the left, or do you get the same kind of errors in the Properties view on the right?

Are you working on a project created in a previous/different version of TBC? Or is this a fresh project but you imported existing RDF/OWL files into it?

If you select your project and do:

    File > New > RDF File

and confirm the default settings, do you get the same errors in the new file?

Richard

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[xerao]

Hi Richard,

I can now confirm that the error is the same whether I use an existing project, create a new project and use existing ontologies, or create a new project and create a new RDF file with the default settings. They all lead to the same error with the class view. I can also confirm that the Properties View does not work and causes the same type of error.

Cheers,

[Richard Cyganiak]

Thanks. In an attempt to narrow down the problem further: Have you previously been able to run a different version of TBC on the same machine? Or the same version of TBC on a different machine?

Richard

[xerao]

Same version of the software runs on a different windows 10 machine with the same ontologies.

[Pat Doyle]

It seems this may be due to GTK issues with Eclipse Mars on Ubuntu 16.04.  Are you using GTK3?  

If so, try GTK2:

https://www.eclipse.org/swt/faq.php#gtkstartup

Here's a bit more info on GTK issues with Eclipse on the most recent Ubuntu releases:

https://www.eclipse.org/forums/index.php/t/1073145/

[xerao]

That solved it!! Thank you very much.

Cheers,