Internal Error: Sub-system: LALE, File: /quartus/legality/lale/lale_new_solver.cpp - Internal Error: Sub-system: LALE, File: /quartus/legality/lale/lale_new_solver.cpp Description Due to a problem in Intel® Quartus® Prime Pro Edition Software version 18.0 or earlier, you may see this Internal Error because of preserved global signals in the project's reused Intel Stratix® 10 partitions. In the developer project where the partition is initially compiled and exported from, some of the signals (does not include the clock signals) may be automatically promoted to global due to high fanout. When reused in the consumer project, the exported partition may result in this Internal Error. Resolution To work around this problem, in a developer project where the partition is initially compiled and exported from, explicitly disable the automatic promotion of signals that may be promoted to global using the following assignment: set_instance_assignment -name GLOBAL_SIGNAL OFF -to <value> -entity <entity name> This problem is scheduled to be fixed in a future version of the Intel® Quartus® Prime Pro Edition Software. Related Articles Why can't I compile Intel® Stratix® 10 partitions exported from another project with a different top-level? Internal Error: Sub-system: PTI, File: /quartus/tsm/pti/pti_tdb_builder.cpp Why I can’t place Intel® Stratix® 10 partitions adjacent to Transceiver Bank, export, and reuse in another project? Why I can’t place Intel® Stratix® 10 partitions adjacent to the I/O Bank of EMIF/PHY Lite/LVDS Interfaces, export, and reuse in another project? Custom Fields values: ['novalue'] Troubleshooting Na False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 19.1 18.0 ['Stratix® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']