Internal Error: Sub-system: TDC, File: /quartus/tsm/tdc/tdc_accessories_delay_budget.cpp, Line: 1449 - Internal Error: Sub-system: TDC, File: /quartus/tsm/tdc/tdc_accessories_delay_budget.cpp, Line: 1449 Description Due to a problem in the Quartus® Prime Standard Edition software version 16.0 and earlier, you may see this internal error during the fitter stage of compilation. Internal Error: Sub-system: TDC, File: /quartus/tsm/tdc/tdc_accessories_delay_budget.cpp, Line: 1449 l_edge_data[leader_edge_id].lower_delay_limit <= l_edge_data[leader_edge_id].upper_delay_limit EPSILON_SECONDS Resolution This problem is fixed beginning with version 16.1 of the Quartus Prime Standard Edition software. Custom Fields values: ['novalue'] Troubleshooting FB: 392767; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Standard'] 16.1 15.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']