Internal Error: Sub-system: QHD, File: /quartus/h/qhd_state_details_sys.h, Line: 65 - Internal Error: Sub-system: QHD, File: /quartus/h/qhd_state_details_sys.h, Line: 65 Description Due to a problem in the Intel® Quartus® Prime Pro edition software version 20.3 and later, you may see this internal error. Internal Error: Sub-system: QHD, File: /quartus/h/qhd_state_details_sys.h, Line: 65 Model 'chip' does not exist The internal error occurs when you open the Logic Lock Region pane, Chip Planner or the Timing Analyzer GUI after running Analysis and Elaboration. Resolution To work around this problem, run Analysis and Synthesis before opening the Logic Lock Region pane, Chip Planner or the Timing Analyzer GUI. This problem is fixed starting with the Intel® Quartus® Prime Pro Edition software version 21.1. Custom Fields values: ['novalue'] Troubleshooting 14013254987 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 21.1 20.3 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']