Internal Error: Sub-system: HSSI, File: /quartus/periph/hssi/hssi_reconfig_op.cpp, Line: 5331 - Internal Error: Sub-system: HSSI, File: /quartus/periph/hssi/hssi_reconfig_op.cpp, Line: 5331 Description You may encounter the above internal error in Quartus II Software versions 12.1 and earlier if you implement the following Arria V GX design transceiver designs Bonded TX only channel driven by CMU PLL through xN clocking or Bonded channel (TX only or duplex) driven by fPLL through xN clocking This is a known bug in the Quartus II Software Resolution To fix this problem, install Quartus II software version 12.1 and software patch 0.dp3. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 12.0.2 ['Arria® V FPGAs and SoCs', 'Arria® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']