Internal Error: Sub-system: DEV, File: /quartus/ddb/dev/dev_basic_info.cpp Internal Error: Sub-system: DYGR, File:/quartus/ddb/dygr/dygr_device_record_manager.cpp - Internal Error: Sub-system: DEV, File: /quartus/ddb/dev/dev_basic_info.cpp Internal Error: Sub-system: DYGR, File:/quartus/ddb/dygr/dygr_device_record_manager.cpp Description Due to a problem in the Quartus® II software version 12.1 and earlier, you may see these error messages when compiling designs with physical synthesis enabled. This problem affects designs targeting Cyclone® V devices if Arria® V device librares are not installed. Resolution To work around this problem, install Arria V device libraries. This problem is fixed beginning with the Quartus II software version 12.1 SP1. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 12.1.1 12.0 ['Cyclone® V GT FPGA', 'Cyclone® V GX FPGA', 'Cyclone® V SE FPGA', 'Cyclone® V ST FPGA', 'Cyclone® V SX FPGA'] ['novalue'] ['novalue'] ['novalue']