CRHTC0202E An error occurred while fetching

I am trying to run a build request to RTC 3.01 on z/OS and it fails.
the Log File shows following messages at the end:
and I am struggling to find out what could be wrong.
I tested the Load zFiles to z/OS and it works fine. Can you help me determine what is wrong?
Thanks

Complete build sequence is
*
* fetch:
* 2011-09-01 19:54:12,592 Add Corrupt Sandbox Listener.
* 2011-09-01 19:54:12,722 Calling File Agent...
* 2011-09-01 19:54:15,965 Remove Corrupt Sandbox Listener.
* 2011-09-01 19:54:15,966 Call FileSystemCore.shutDown()
*
* BUILD FAILED
* java.lang.reflect.InvocationTargetException
* at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
* at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
* at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
* at java.lang.reflect.Method.invoke(Method.java:599)
* at com.ibm.teamz.build.ant.tasks.zos.LoadFiles.execute(LoadFiles.java:199)
* at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
* at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
* at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
* at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
* at java.lang.reflect.Method.invoke(Method.java:599)
* at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
* at org.apache.tools.ant.Task.perform(Task.java:348)
* at org.apache.tools.ant.Target.execute(Target.java:357)
* at org.apache.tools.ant.Target.performTasks(Target.java:385)
* at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
* at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
* at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
* at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
* at org.apache.tools.ant.Main.runBuild(Main.java:758)
* at org.apache.tools.ant.Main.startAnt(Main.java:217)
* at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
* at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
* Caused by: com.ibm.teamz.fileagent.FileAgentRepositoryException: CRHTC0202E An error occurred while fetching contents from workspace CICSCobolProject Stream Workspace to NAGA.
* at com.ibm.teamz.fileagent.internal.operations.LoadWorkspaceOperation.execute(LoadWorkspaceOperation.java:75)
* at com.ibm.teamz.fileagent.internal.macrooperations.Operation.run(Operation.java:37)
* at com.ibm.teamz.fileagent.internal.macrooperations.MacroOperation.execute(MacroOperation.java:135)
* at com.ibm.teamz.fileagent.internal.macrooperations.Operation.run(Operation.java:37)
* at com.ibm.teamz.fileagent.ExecuteXMLFileCapacity.doExecuteXMLFileCapacity(ExecuteXMLFileCapacity.java:98)
* at com.ibm.teamz.fileagent.ExecuteXMLFileCapacity.executeXMLFileCapacity(ExecuteXMLFileCapacity.java:75)
* at com.ibm.teamz.fileagent.ExecuteXMLFileCapacity.executeXMLFileCapacity(ExecuteXMLFileCapacity.java:57)
* ... 22 more
* Caused by: com.ibm.team.filesystem.client.FileSystemStatusException: Status ERROR: com.ibm.team.filesystem.client code=4 Failed to load due to 1 invalid requests null children=
* at com.ibm.team.filesystem.client.internal.operations.FileSystemOperation.reportErrorsAsException(FileSystemOperation.java:235)
* at com.ibm.team.filesystem.client.internal.operations.LoadOperation.notifyDilemmaHandler(LoadOperation.java:854)
* at com.ibm.team.filesystem.client.internal.operations.LoadOperation$1.run(LoadOperation.java:592)
* at com.ibm.team.filesystem.client.internal.SharingManager.runWithinFileSystemLock(SharingManager.java:802)
* at com.ibm.team.filesystem.client.internal.operations.FileSystemOperation.runWithinFileSystemLock(FileSystemOperation.java:164)
* at com.ibm.team.filesystem.client.internal.operations.FileSystemOperation.runWithinFileSystemLock(FileSystemOperation.java:144)
* at com.ibm.team.filesystem.client.internal.operations.LoadOperation.execute(LoadOperation.java:624)
* at com.ibm.team.filesystem.client.internal.operations.FileSystemOperation.run(FileSystemOperation.java:89)
* at com.ibm.teamz.fileagent.Zutility.zloadOnUSS(Zutility.java:327)
* at com.ibm.teamz.fileagent.Zutility.zload2(Zutility.java:259)
* at com.ibm.teamz.fileagent.internal.operations.LoadWorkspaceOperation.execute(LoadWorkspaceOperation.java:66)
* ... 28 more
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