Internal Error: Sub-system: QHD, File: /quartus/comp/qhd/qhd_database_model_utils.cpp, Line: 828. - Internal Error: Sub-system: QHD, File: /quartus/comp/qhd/qhd_database_model_utils.cpp, Line: 828. Description You may see this error when compiling the Partial Reconfiguration (PR) Implementation Revision. This error occurs when the design includes HSSI/PCIe ports that drive a PR partition that does not have any fan out in the PR Base Revision. This problem only affects Intel® Arria® 10 devices. Resolution To solve this problem, perform either of the f ollowing actions: Add fanout to these HSSI/PCIE ports in the PR Base Revision. Disconnect these HSSI/PCIE ports from the PR partition in the PR Base Revision. Custom Fields values: ['novalue'] Troubleshooting 1508847924 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 21.1 ['Arria® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']