histo_events_request->after_chunk_tracefile = NULL;
histo_events_request->after_chunk_trace = NULL;
histo_events_request->after_chunk_traceset = histo_after_chunk_traceset;//NULL;
histo_events_request->after_chunk_tracefile = NULL;
histo_events_request->after_chunk_trace = NULL;
histo_events_request->after_chunk_traceset = histo_after_chunk_traceset;//NULL;