Hi, I run the sample of Augmented-CRC Functions on Microsoft Visual C++ 2005 But assert(crc2.checksum() == crc1) failed. http://www.boost.org/doc/libs/1_36_0/libs/crc/crc.html#crc_basic Augmented-CRC Functions // Main function int main () { using boost::uint16_t; using boost::augmented_crc; uint16_t data[6] = { 2, 4, 31, 67, 98, 0 }; uint16_t const init_rem = 0x123; uint16_t crc1 = augmented_crc<16, 0x8005>( data, sizeof(data), init_rem ); uint16_t const zero = 0; uint16_t const new_init_rem = augmented_crc<16, 0x8005>( &zero, sizeof(zero) ); boost::crc_basic<16> crc2( 0x8005, new_init_rem ); crc2.process_block( data, &data[5] ); // don't include CRC assert( crc2.checksum() == crc1 ); std::cout << "All tests passed." << std::endl; return 0; } Alex Vinokur This message and the information contained herein is proprietary and confidential and subject to the Amdocs policy statement, you may review at http://www.amdocs.com/email_disclaimer.asp