aocl program and aocl diagnose commands fail - aocl program and aocl diagnose commands fail Dear community, I started to work with Intel OpenCL SDK and DE5-Net. I Installed the BSP support for DE5-Net provided by Terasic into the OpenCL directory of IntelFPGA software and I followed the instructions in the DE5-Net OpenCL guide. I have executed successfully the command "aocl install" and "aocl flash acl0 hello_world.aocx". I did a power cycle of the PC and it seems that the "acl" device is inside /proc/devices. You can find the output of "dmesg" command about the PCI driver and the output of "cat /proc/devices | grep acl" below: dmesg [ 3.975583] FPGA manager framework [ 3.981245] fpga_manager fpga0: Altera CvP FPGA Manager @0000:4f:00.0 registered [ 3.981407] aclpci_drv: loading out-of-tree module taints kernel. [ 3.981490] aclpci_drv: module verification failed: signature and/or required key missing - tainting kernel [ 3.981687] aclpci_init (692): [ 3.981688] ---------------------------- [ 3.981688] aclpci_init (693): [ 3.981689] Driver version: 18.1. [ 3.981694] aclpci_init (714): [ 3.981694] pci_register_driver [ 3.981719] aclpci_init (720): [ 3.981719] success cat /proc/devices | grep acl 239 acl But when I run the command "aocl program acl0 hello_world.aocx" I got this output: aocl program: Running program from /home/fciverch/intelFPGA/18.1/hld/board/terasic/de5net/linux64/libexec Unable to open the device acl0. aocl program: Program failed. For "aocl diagnose" the output is the following: Verified that the kernel mode driver is installed on the host machine. Using board package from vendor: Terasic Corporation Querying information for all supported devices that are installed on the host machine ... Found no active device installed on the host machine. Please make sure to: 1. Set the environment variable AOCL_BOARD_PACKAGE_ROOT to the correct board package. 2. Install the driver from the selected board package. 3. Properly install the device in the host machine. 4. Configure the device with a supported OpenCL design. 5. Reboot the machine if the PCI Express link failed. DIAGNOSTIC_FAILED There is no /dev/acl0 peripheral created and I tried to create it manually using the command "mknod /dev/acl0 c 239 0", but the problem persists. Could you please give me some suggestions to fix the issue? Why the peripheral is inside the /proc/devices list but the /dev/acl0 is not created? I use Quartus prime standard 18.1 and OpenCL SDK 18.1. The BSP for DE5-Net is the latest 18.0 with some changes to be compatible with 18.1. The operative system is Ubuntu 16.04 equipped with Intel Xeon processor and the kernel is 4.15.0-38-generic. Thank you for your support. Best Regards, Federico Civerchia Replies: Re: aocl program and aocl diagnose commands fail Finally I fix the problem. The kernel modules "altera_cvp" and "fpga_mgr" managed the PCIe instead of " aclpci_drv". Removing that modules fixed the issue. Federico