Internal Error: Sub-system: A2C, File: /quartus/h/a2c_directives_sys.h, Line: 589 - Internal Error: Sub-system: A2C, File: /quartus/h/a2c_directives_sys.h, Line: 589 Description Due to a problem in Intel® Quartus® Prime Standard Edition version 16.0 update 1 or later, you may see this error when a corrupted report being called in Chip Planner. Resolution To work around this problem, go to Report Pane in Chip Planner and delete all the reports under the context menu. This problem is fixed beginning with Intel Quartus Prime Standard Edition software version 16.1 Update 2. Custom Fields values: ['novalue'] Troubleshooting FB: 391058; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software QUARTUS-ALITE', 'FPGA Dev Tools Quartus® Prime Software Standard'] novalue 16.0.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']