Why do I see rx_ready not asserting, or incorrect TX data rates in Agilex® 7 F‑Tile or Agilex® 5/3 FPGA GTS device transceiver simulations using the Quartus® Prime Pro 25.3.1 or earlier software with Siemens QuestaSim® Altera Edition software? - Why do I see rx_ready not asserting, or incorrect TX data rates in Agilex® 7 F‑Tile or Agilex® 5/3 FPGA GTS device transceiver simulations using the Quartus® Prime Pro 25.3.1 or earlier software with Siemens QuestaSim® Altera Edition software? Description Due to a bug in the Quartus® Prime Pro 25.3.1 and earlier software for Agilex® 7 F‑Tile or Agilex ® 5/3 FPGA GTS devices, you may see the rx_ready signal not asserting, or incorrect TX data rates when simulating with the Siemens QuestaSim* Altera® Edition software. Resolution To work around this problem, you can update your design to the Quartus Prime Pro software version 26.1 and create a script that sets the following environment variables and then calls the Quartus Prime Pro software generated msim_setup.tcl file. set QUARTUS_SIM_LIB_DIR <quartus_installation>/quartus/eda/sim_lib2 set DEVICES_SIM_LIB_DIR <quartus_installation>/devices/sim_lib2 set ENABLE_QE_LIBRARY_COMPILATION "true" source msim_setup.tcl This problem will be fixed in a future version of the Quartus Prime Pro software. Custom Fields values: ['novalue'] Troubleshooting QS-48580 novalue ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 26.1 25.3.1 ['Agilex™ 3 FPGAs and SoCs', 'Agilex™ 5 FPGAs and SoCs', 'Agilex™ 7 FPGAs and SoCs', 'Agilex™ 9 FPGAs and SoCs', 'Agilex™ 9 FPGA Direct RF-Series'] ['Simulation Dev Tools Questa'] ['novalue'] ['novalue']