topic Nullpointer DefaultProcessDiagramGenerator in Alfresco Forum https://connect.hyland.com/t5/alfresco-forum/nullpointer-defaultprocessdiagramgenerator/m-p/36687#M15476 <HTML><HEAD></HEAD><BODY><P>Hi, I am Using Activiti 5.22 and I want to create a process diagram using the&nbsp;<SPAN style="background-color: #f6f6f6;">DefaultProcessDiagramGenerator. When I call&nbsp;the generateDiagram Method I get a NullPointerException.</SPAN></P><P></P><BLOCKQUOTE class="jive_macro_quote jive-quote jive_text_macro"><P>Caused by: java.lang.NullPointerException<BR /> at org.activiti.image.impl.DefaultProcessDiagramGenerator.initProcessDiagramCanvas(DefaultProcessDiagramGenerator.java:810) [activiti-image-generator-5.22.0.jar:5.22.0]<BR /> at org.activiti.image.impl.DefaultProcessDiagramGenerator.generateProcessDiagram(DefaultProcessDiagramGenerator.java:475) [activiti-image-generator-5.22.0.jar:5.22.0]<BR /> at org.activiti.image.impl.DefaultProcessDiagramGenerator.generateDiagram(DefaultProcessDiagramGenerator.java:403) [activiti-image-generator-5.22.0.jar:5.22.0]<BR /> at org.activiti.image.impl.DefaultProcessDiagramGenerator.generateDiagram(DefaultProcessDiagramGenerator.java:408) [activiti-image-generator-5.22.0.jar:5.22.0]<BR /> at org.activiti.image.impl.DefaultProcessDiagramGenerator.generateDiagram(DefaultProcessDiagramGenerator.java:417) [activiti-image-generator-5.22.0.jar:5.22.0]</P></BLOCKQUOTE><P></P><P><SPAN style="background-color: #f6f6f6;">My method to get the process diagram:</SPAN></P><BLOCKQUOTE class="jive_macro_quote jive-quote jive_text_macro"><P>public byte[] getProcessDiagram(final String pProcessInstanceId) {<BR /> &nbsp;&nbsp;&nbsp;RepositoryService lRepService = ProcessEngineManager.getEngine().getRepositoryService();<BR /> &nbsp;&nbsp;&nbsp;RuntimeService lRuntimeService = ProcessEngineManager.getEngine().getRuntimeService();</P><P>&nbsp;&nbsp;&nbsp;byte[] data = null;<BR /> &nbsp;&nbsp;&nbsp;ProcessInstance pi = &nbsp;&nbsp;&nbsp;lRuntimeService.createProcessInstanceQuery().processInstanceId(pProcessInstanceId).singleResult();<BR /> &nbsp;&nbsp;&nbsp;ProcessDiagramGenerator processDiagramGenerator = new DefaultProcessDiagramGenerator();<BR /> &nbsp;&nbsp;&nbsp;BpmnModel model = lRepService.getBpmnModel(pi.getProcessDefinitionId());<BR /> &nbsp;&nbsp;&nbsp;InputStream is = processDiagramGenerator.generateDiagram(model, "png", &nbsp;&nbsp;&nbsp;lRuntimeService.getActiveActivityIds(pi.getId()));<BR /> &nbsp;&nbsp;&nbsp;data = IoUtil.readInputStream(is, "ProcessDiagram");<BR /> &nbsp;&nbsp;&nbsp;try {<BR /> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;is.close();<BR /> &nbsp;&nbsp;&nbsp;} catch (IOException e) {<BR /> &nbsp;&nbsp;&nbsp;e.printStackTrace();<BR /> &nbsp;&nbsp;&nbsp;}<BR /> &nbsp;&nbsp;&nbsp;return data;<BR /> }</P></BLOCKQUOTE><P></P><P>I attached my BPM Model.</P><P>The DefaultProcessDiagramGenerator needs the&nbsp;bpmndi:BPMNDiagram tags, I'm right?</P><P></P><P>Does somebody has any idea?</P></BODY></HTML> Tue, 07 Aug 2018 07:53:16 GMT kroninho 2018-08-07T07:53:16Z Nullpointer DefaultProcessDiagramGenerator https://connect.hyland.com/t5/alfresco-forum/nullpointer-defaultprocessdiagramgenerator/m-p/36687#M15476 Hi, I am Using Activiti 5.22 and I want to create a process diagram using the&nbsp;DefaultProcessDiagramGenerator. When I call&nbsp;the generateDiagram Method I get a NullPointerException.Caused by: java.lang.NullPointerException at org.activiti.image.impl.DefaultProcessDiagramGenerator.initProcessDiagramCanv Tue, 07 Aug 2018 07:53:16 GMT https://connect.hyland.com/t5/alfresco-forum/nullpointer-defaultprocessdiagramgenerator/m-p/36687#M15476 kroninho 2018-08-07T07:53:16Z Re: Nullpointer DefaultProcessDiagramGenerator https://connect.hyland.com/t5/alfresco-forum/nullpointer-defaultprocessdiagramgenerator/m-p/36688#M15477 <HTML><HEAD></HEAD><BODY><P>For generating a diagram of a process instance this might be helpful&nbsp;<A class="link-titled" href="https://github.com/Activiti/Activiti/blob/5.x/modules/activiti-rest/src/main/java/org/activiti/rest/service/api/runtime/process/ProcessInstanceDiagramResource.java#L51" title="https://github.com/Activiti/Activiti/blob/5.x/modules/activiti-rest/src/main/java/org/activiti/rest/service/api/runtime/process/ProcessInstanceDiagramResource.java#L51" rel="nofollow noopener noreferrer">Activiti/ProcessInstanceDiagramResource.java at 5.x · Activiti/Activiti · GitHub</A>&nbsp;</P></BODY></HTML> Wed, 08 Aug 2018 13:36:49 GMT https://connect.hyland.com/t5/alfresco-forum/nullpointer-defaultprocessdiagramgenerator/m-p/36688#M15477 bassam_al-saror 2018-08-08T13:36:49Z