https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Bug-in-tbb-pipeline-example/m-p/798614#M523 I think I just answerd my own question. I think the serial output filter is what makes this example work.<BR /><BR />If this filter is omitted, then the problem occurs. Mon, 27 Jun 2011 17:10:52 GMT Shao_Lo 2011-06-27T17:10:52Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Bug-in-tbb-pipeline-example/m-p/798613#M522 The implementation of MyInputFilter uses a size_t next_buffer to cycle through the MyTransformFilter objects. If the MyTransformFilter operators do not complete in the proper order, won't MyInputFilter's operator overwrite data in the wrong MyBuffer?..or is there some serialization that I'm missing??<BR /> Mon, 27 Jun 2011 16:53:29 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Bug-in-tbb-pipeline-example/m-p/798613#M522 Shao_Lo 2011-06-27T16:53:29Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Bug-in-tbb-pipeline-example/m-p/798614#M523 I think I just answerd my own question. I think the serial output filter is what makes this example work.<BR /><BR />If this filter is omitted, then the problem occurs. Mon, 27 Jun 2011 17:10:52 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Bug-in-tbb-pipeline-example/m-p/798614#M523 Shao_Lo 2011-06-27T17:10:52Z