NullPointerException when compiling

[richard.w.leir]

Hi

Studio is giving me this:
java.lang.NullPointerException
    at net.sf.jasperreports.eclipse.builder.JasperReportCompiler.setValidationMarkers(JasperReportCompiler.java:332)
    at net.sf.jasperreports.eclipse.builder.JasperReportCompiler.compileReport(JasperReportCompiler.java:294)
    at com.jaspersoft.studio.data.jrdsprovider.JRDSProviderFieldsProvider.getFields(JRDSProviderFieldsProvider.java:51)
    at com.jaspersoft.studio.data.jrdsprovider.JrdsProviderDataAdapterDescriptor.getFields(JrdsProviderDataAdapterDescriptor.java:56)
    at com.jaspersoft.studio.data.ui.EmptyWizardDataEditorComposite.readFields(EmptyWizardDataEditorComposite.java:69)

There are many things in my setup which might be causing this, so what should I check first. In some other open source project I could have a look at line 332 and figure out what I have done wrong quickly. But where is the source code for JasperReportCompiler.java?  

My next step will be to read more documentation. 

Then compare my jrxml with some known good jrxml.

thanks -- Rick

 

 

[richard.w.leir]

Now I get it, maybe.  This uses the GoF Builder pattern to create JasperReportCompiler?

https://stackoverflow.com/questions/29493898/automatically-create-builder-for-class-in-eclipse

[richard.w.leir]

Ok, the source code is in a jar in plugins/src