Internal Error: Sub-system: OPT, File: /quartus/synth/opt/opt_op_decsel.cpp, Line: 2046 - Internal Error: Sub-system: OPT, File: /quartus/synth/opt/opt_op_decsel.cpp, Line: 2046 Description Due to a problem in the Intel® Quartus® Prime Standard Edition software version 20.1 and earlier, you may see this error if the RAM inference is not enabled Resolution To work around this problem, apply the below setting in the Quartus® setting file (.qsf). set_global_assignment -name AUTO_RAM_RECOGNITION ON Custom Fields values: ['novalue'] Troubleshooting 1507940440 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Standard'] novalue 20.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']