Build fails saying a snapshot is missing when it exists

I have a problem. The builds fails on Stream and Workspace saying the snapshot is missing, same message for Stream and Workspace.

I have create 2 snapshots in Stream and Workspace.

there are not pending changes between them.

What can be wrong?

[generateChangeLog] Not using a proxy to reach https://igartc02.swg.usma.ibm.com/jazz/
[generateChangeLog] com.ibm.team.build.common.TeamBuildException: Illegal currentBuildResultUUID: The build result with UUID "_2FG2IK0dEeeFMdryLKNlNQ" has no snapshot.
[generateChangeLog]     at com.ibm.team.build.ant.task.GenerateChangeLogTask.getSnapshotContribution(GenerateChangeLogTask.java:371)
[generateChangeLog]     at com.ibm.team.build.ant.task.GenerateChangeLogTask.doExecute(GenerateChangeLogTask.java:259)
[generateChangeLog]     at com.ibm.team.build.ant.task.AbstractTeamBuildTask.execute(AbstractTeamBuildTask.java:974)
[generateChangeLog]     at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
[generateChangeLog]     at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
[generateChangeLog]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
[generateChangeLog]     at java.lang.reflect.Method.invoke(Method.java:611)
[generateChangeLog]     at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
[generateChangeLog]     at org.apache.tools.ant.Task.perform(Task.java:348)
[generateChangeLog]     at org.apache.tools.ant.Target.execute(Target.java:357)
[generateChangeLog]     at org.apache.tools.ant.Target.performTasks(Target.java:385)
[generateChangeLog]     at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
[generateChangeLog]     at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38)
[generateChangeLog]     at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
[generateChangeLog]     at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:416)
[generateChangeLog]     at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105)
[generateChangeLog]     at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
[generateChangeLog]     at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
[generateChangeLog]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
[generateChangeLog]     at java.lang.reflect.Method.invoke(Method.java:611)
[generateChangeLog]     at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
[generateChangeLog]     at org.apache.tools.ant.Task.perform(Task.java:348)
[generateChangeLog]     at org.apache.tools.ant.Target.execute(Target.java:357)
[generateChangeLog]     at org.apache.tools.ant.Target.performTasks(Target.java:385)
[generateChangeLog]     at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
[generateChangeLog]     at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
[generateChangeLog]     at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
[generateChangeLog]     at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
[generateChangeLog]     at org.apache.tools.ant.Main.runBuild(Main.java:758)
[generateChangeLog]     at org.apache.tools.ant.Main.startAnt(Main.java:217)
[generateChangeLog]     at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
[generateChangeLog]     at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)