Error Creating Custom Visualization Component Using Jasper Studio

[mca.amitrami]

Hi,

I getting error when try to create custom visualization component using jasper studio JasperReports 6.4.31 commercial version.

Error is: Could not initialize Velocity.

java.lang.NullPointerException
    at org.apache.velocity.runtime.RuntimeInstance.parse(RuntimeInstance.java:1198)
    at org.apache.velocity.runtime.RuntimeInstance.parse(RuntimeInstance.java:1181)
    at org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1297)
    at org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1265)
    at org.apache.velocity.app.Velocity.evaluate(Velocity.java:180)
    at com.jaspersoft.studio.components.customvisualization.creation.wizard.CustomVisualizationComponentWizard.generateJsResource(CustomVisualizationComponentWizard.java:472)
    at com.jaspersoft.studio.components.customvisualization.creation.wizard.CustomVisualizationComponentWizard.generateRender(CustomVisualizationComponentWizard.java:460)
    at com.jaspersoft.studio.components.customvisualization.creation.wizard.CustomVisualizationComponentWizard.access$3(CustomVisualizationComponentWizard.java:456)
    at com.jaspersoft.studio.components.customvisualization.creation.wizard.CustomVisualizationComponentWizard$1.run(CustomVisualizationComponentWizard.java:152)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)

 

Thanks,
Amit Rami
 

[p.neuser]

Hi!

is there any news in this case? We are facing the same issue in Jasper Studio Professional 7.1.0 and 6.3.1. I'm tasked with evaluating how custom components can help us with a couple of problems we are facing and got stuck just in the beginning?

Kind regards,

Philipp Neuser

 

 

[p.neuser]

Ok, I've put some further investigation into this. When creating your custom component velocity tries to write its logfile to current working directory, which is not writeable as long as you don't start Jasper Studio as an Administrator.

A workaround is to make your installation directory writeable to all users. This should be definitely fixed in Jasper Studio in the long run as this is not good practice.

Regards,

Philipp Neuser

[lumibres]

Philipp Neuser is right.

If you faced like this problem...

you must execute the jasper studio by "Administrator mode"