Recursive remove operation raises NullPointerException

main ERROR 04:04:34,155   ERROR (SOSFileListEntry.java:986) ::run SOSVfs_E_229: error. unable to transfer data, reason: java.lang.NullPointerException
main TRACE 04:04:34,157   TRACE (JobSchedulerException.java:103) ::saveException
java.lang.NullPointerException
        at com.sos.VirtualFileSystem.DataElements.SOSFileListEntry.getTargetFile(SOSFileListEntry.java:633)
        at com.sos.VirtualFileSystem.DataElements.SOSFileListEntry.run(SOSFileListEntry.java:896)
        at com.sos.DataExchange.SOSDataExchangeEngine.sendFiles(SOSDataExchangeEngine.java:820)
        at com.sos.DataExchange.SOSDataExchangeEngine.transfer(SOSDataExchangeEngine.java:1052)
        at com.sos.DataExchange.SOSDataExchangeEngine.execute(SOSDataExchangeEngine.java:329)
        at com.sos.DataExchange.SOSDataExchangeEngineMain.Execute(SOSDataExchangeEngineMain.java:77)
        at com.sos.DataExchange.SOSDataExchangeEngineMain.main(SOSDataExchangeEngineMain.java:44)
main ERROR 04:04:34,160   ERROR (SOSDataExchangeEngine.java:1084) ::transfer SOSDataExchangeEngine.TRANSFER_ABORTED