activiti modeler fails creating new process diagram

[btomas]

The activiti modeler setuped according to http://code.google.com/p/signavio-core-components/wiki/InstallationInstructions and the UTF8 is ok.
OS windows7
Tomcat 6.0.36
Firefox 16.0.1 / Chrome 22.0.1229.94

Steps to reproduce:
The modeler starts-up.
Choose New -> Business Process Diagram (BPMN 2.0)
New tab appears with a never ending running progress for creating new diagram and new diagram is not created

Tomcat logs:

Imitated creation of reprensentation of type PNG_SMALL
Failed to return reprensentation of type PNG_SMALL
Imitated creation of reprensentation of type PNG_SMALL
Failed to return reprensentation of type PNG_SMALL
java.lang.NullPointerException
   at com.signavio.editor.handler.EditorHandler.getJSONString(EditorHandler.java:400)
   at com.signavio.editor.handler.EditorHandler.doGet(EditorHandler.java:108)
   at com.signavio.platform.servlets.DispatcherServlet.dispatch(DispatcherServlet.java:121)
   at com.signavio.platform.servlets.DispatcherServlet.doGet(DispatcherServlet.java:163)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at com.signavio.platform.filters.ParseParametersFilter.doFilter(ParseParametersFilter.java:88)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at com.signavio.platform.filters.AuthenticationFilter.doFilter(AuthenticationFilter.java:64)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at com.signavio.platform.filters.EncodingFilter.doFilter(EncodingFilter.java:67)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at com.signavio.platform.filters.HandlerFilter.doFilter(HandlerFilter.java:86)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at com.signavio.platform.filters.RequestExceptionFilter.doFilter(RequestExceptionFilter.java:106)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
   at com.googlecode.psiprobe.Tomcat60AgentValve.invoke(Tomcat60AgentValve.java:30)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
   at java.lang.Thread.run(Thread.java:662)
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The same occures both on Windows and on Linux.

Has anybody faced such an issue and how to solve it?

[jbarrez]

We've released a 'beta version' of our new Modeler: download it at http://activiti.org/download.html

That one is much easier to install and run.

[btomas]

it works!
it is good to know that it'll be supported http://bpmn20inaction.blogspot.nl/2012/09/activiti-modeler-getting-started-part-1.html

[jbarrez]

Great to hear!