Fatal Error: Read data comes back but dynamic OCT ctrl is not in read mode - Fatal Error: Read data comes back but dynamic OCT ctrl is not in read mode Description You may see the following error when you simulate the UniPHY based DDR3 controller in full calibration mode. # ** Fatal: Read data comes back but dynamic OCT ctrl is not in read mode Resolution Open the following file in your simulation file-set: altdq_dqs2_ddio_3reg_<user_device>.sv Find the following line: (1, "Read data comes back but dynamic OCT ctrl is not in read mode"); Replace the line above with the following line: ("Read data comes back but dynamic OCT ctrl is not in read mode at time %f", ); The simulation should run without any errors once the above change is implemented. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 13.0 ['Stratix® IV E FPGA', 'Stratix® IV GT FPGA', 'Stratix® IV GX FPGA', 'Stratix® V E FPGA', 'Stratix® V GS FPGA', 'Stratix® V GT FPGA', 'Stratix® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']