Development kit: Stratix IV GX FPGA Development Kit (RoHS), 530 Edition fFPGA: EP4SGX530KH40C4 Quartus version: 11.1 SP2 OS: Debian I accidentally rewrote flash memory of Stratix 4 GX development kit and trying to restore it to default board update portal, according to User Guide. I changed all dip switches to factory one. I uploaded SOF image s4gx530_fpga_bup.sof, using both programmer GUI from quartus and programmer CLI (using command nios2-configure-sof). When I'm trying to reprogram flash memory with command (bash ./restore.sh) and writing "r", I'm receiving following error: nios2-flash-programmer -b 0x08000000 restore_s4gx530_fpga_bup.flash Using cable "USB-Blaster [1-2]", device 1, instance 0x00 Resetting and pausing target processor: OK No CFI table found at address 0x08000000 Leaving target processor paused Note: the board FPGA should be configured as described in the User's Guide, chapter entitled: "Restoring the Flash Device with the Factory Settings" Done. I tried using different version of quartus 2 (11.1 sp2, 11.1), quartus prime (15.1, 16.1) and programmer, but nothing really changes this error. Can you help me out with pointing what should I be looking for?