Why did I get a fatal error when using the Quartus® Power Analyzer? - Why did I get a fatal error when using the Quartus® Power Analyzer? Description Due to a problem in the Quartus® Prime Pro Edition software version 19.1 and later, you may see the fatal error message in the Quartus® Power Analyzer when generating a .vcd file for Power Analysis. This is because there is a wrong entity set “set_instance_assignment POWER_READ_INPUT_FILE” in your .qsf file. Problem Details Error: *** Fatal Error: Segment Violation at (nil) Module: quartus_pow Stack Trace: 0x2e77f: PFIO_VCD_PARSER_EVENT_HANDLER::handle_upscope() 0x31f (power_pfio) 0xfce0: pfio_vcd_parser_yyparse(FlexLexer*) 0x9e0 (power_pfio) 0xfeed: pfio_vcd_invoke_parser(pfio_vcd_lexer_yyFlexLexer*, PFIO_VCD_PARSER_EVENT_HANDLER*) 0x2d (power_pfio) 0x50d10: PFIO_VCD_READER_MAIN::load_signal_statistics_from_vcd_files(PUTIL_SA_DATA*) 0x5a0 (power_pfio) 0x404d1: PAN_UTILITY_IMPL::load_putil_sa_data_from_file() 0x84d (power_pan) Resolution To work around this problem, set the correct entity name of the simulation nodes. Use either one of the methods below: 1. In the .qsf file modify the set_instance_assignment -name POWER_READ_INPUT_FILE <.vcd file name> -to -entity 2. In the Quartus® Prime Pro GUI : a. From the top menu, go to Processing and select Power Analyzer Tool b. In the Input file box, click Add Power Input File(s)… c. On the Power Analyzer Settings , click Add d. On the File name entry, select correct .vcd file e. For the Entity entry, select the correct entity f. Click OK g. Click Apply Custom Fields values: ['novalue'] Troubleshooting 18011711285 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 19.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']