Internal Error: Sub-system: ASMGX, File: /quartus/comp/asmgx/asmgx_stratixv.cpp, Line: 480 - Internal Error: Sub-system: ASMGX, File: /quartus/comp/asmgx/asmgx_stratixv.cpp, Line: 480 Description Due to a problem in the Quartus® II software version 12.0 SP2, you may see this error during the Assembler if your design targets a Stratix® V device. Resolution To fix this problem, download and install the Stratix V/Arria® V/Cyclone® V device patch 2.dp5 or later from the related solution below. You must install the Quartus II software version 12.0 SP2 before installing this patch. This problem is fixed beginning with the Quartus II software version 12.1. Related Articles How do I address known software issues for Stratix V, Arria V and Cyclone V devices in the Quartus II software version 12.0 SP2? Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 12.1 12.0.2 ['Stratix® V E FPGA', 'Stratix® V GS FPGA', 'Stratix® V GT FPGA', 'Stratix® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']