Internal Error: Sub-system: WSC, File: /quartus/neto/wsc/wsc_hierarchy_info.cpp, Line: 3257 - Internal Error: Sub-system: WSC, File: /quartus/neto/wsc/wsc_hierarchy_info.cpp, Line: 3257 Description Due to a problem in the Intel® Quartus® Prime Standard Edition Software version 20.1 and earlier, you might see this error when you have RESERVE_PIN AS_BIDIRECTIONAL assignments in the QSF file for pins that are not used by the design. Resolution To work around this problem, remove the RESERVE_PIN AS_BIDIRECTIONAL assignments from the QSF file if the pin is not used by the design. This problem is fixed starting with the Intel® Quartus® Prime Standard Edition Software version 21.1. Custom Fields values: ['novalue'] Troubleshooting 1509270096 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Standard'] 21.1 20.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']