A system, method and data structure for error correction for use in the transmission of content data distribution networks uses a compressed memory, for example a bitmap, to identify portions of transmitted content data files where transmission errors have occurred. Each method includes an exception handler array defining exception handlers associated with the method. The number of bits per cell may be decreased when fidelity is more important. The direction of the resulting magnetic field is also approximately parallel to the direction defined by the tie line connecting the substrate and the inductively coupled plasma.