I run > ant start.human.task and I got following error:
C:\DevTools\jbpm-5.4.0-installer>ant start.human.task
Buildfile: build.xml
start.human.task:
[java] 0 19/12 01:27:00,212[main] ERROR task.identity.DefaultUserGroupCa
llbackImpl.<init> - Error when loading group information for callback from loca
tion: file:null/roles.properties
[java] java.io.FileNotFoundException: null\roles.properties (The system can
not find the path specified)
[java] at java.io.FileInputStream.open(Native Method)
[java] at java.io.FileInputStream.<init>(FileInputStream.java:120)
[java] at java.io.FileInputStream.<init>(FileInputStream.java:79)
[java] at sun.net.www.protocol.file.FileURLConnection.connect(FileURLCo
nnection.java:70)
[java] at sun.net.www.protocol.file.FileURLConnection.getInputStream(Fi
leURLConnection.java:161)
[java] at java.net.URL.openStream(URL.java:1010)
[java] at org.jbpm.task.identity.DefaultUserGroupCallbackImpl.<init>(De
faultUserGroupCallbackImpl.java:55)
[java] at org.jbpm.task.identity.DefaultUserGroupCallbackImpl.<init>(De
faultUserGroupCallbackImpl.java:40)
[java] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
[java] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeC
onstructorAccessorImpl.java:39)
[java] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Del
egatingConstructorAccessorImpl.java:27)
[java] at java.lang.reflect.Constructor.newInstance(Constructor.java:51
3)
[java] at java.lang.Class.newInstance0(Class.java:355)
[java] at java.lang.Class.newInstance(Class.java:308)
[java] at org.jbpm.task.identity.UserGroupCallbackManager.setCallbackFr
omProperties(UserGroupCallbackManager.java:69)
[java] at org.jbpm.DemoTaskService.main(Unknown Source)
[java] Task service registered usergroup callback ...
[java] Task service started correctly!
[java] Task service running ...
[java] Exception in thread "Thread-1" java.lang.RuntimeException: Could not
start human task server, address already in use, is it possible that another in
stance of the task server is already running?
[java] at org.jbpm.task.service.mina.BaseMinaTaskServer.run(BaseMinaTas
kServer.java:65)
[java] at java.lang.Thread.run(Thread.java:662)
BUILD SUCCESSFUL
Total time: 1 minute 2 seconds
C:\DevTools\jbpm-5.4.0-installer>