Why does the Intel® Quartus® Prime Pro Edition Software v20.2 prompts an internal error when generating the GPIO IBIS model with Intel® Stratix® 10 DX devices? - Why does the Intel® Quartus® Prime Pro Edition Software v20.2 prompts an internal error when generating the GPIO IBIS model with Intel® Stratix® 10 DX devices? Description Due to a problem with the Intel® Quartus® Prime Pro Edition Software v20.2 and earlier, you may see an internal error is prompted when generating the GPIO IBIS model. You may observe an internal error message: Unknown I/O cell name. This problem only happens on Intel® Stratix® 10 DX devices. Resolution To work around this problem, download and install the following patch for the Intel® Quartus® Prime Pro Edition Software v20.2: Version 20.2 patch 0.39 for Windows (.exe) Version 20.2 patch 0.39 for Linux (.run) Readme for the Intel® Quartus® Prime Pro Edition Software v20.2 patch 0.39 (.txt) Please contact Intel Support if you need patches for earlier versions. This problem is fixed starting with the Intel® Quartus® Prime Pro Edition Software v20.3. Custom Fields values: ['novalue'] Troubleshooting 1508279515 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 20.3 20.2 ['Stratix® 10 DX FPGA', 'Stratix® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']