Why do I unexpectedly observe intermittent DDM Errors?
Description Beginning January 10, 2026, executing commands in the terminal or GUI of Quartus® Prime Pro Edition software, Quartus Embedded Edition software or select standalone tools may cause the software or tool to crash with an error similar to the crash signature shown below. This error affects: Quartus Prime Pro Software versions v23.3 through v25.3.1 Standalone Quartus Prime Pro Programmer v23.3 through v25.3.1 Standalone Quartus Prime Pro Embedded Edition v25.3 and v25.3.1 Standalone Quartus Prime Pro Power Thermal Analyzer v25.3 through v25.3.1 This issue is not observed in Quartus Prime Pro Edition versions 23.2 or prior or Quartus Prime Standard Edition. Crash Signature: Error (22912): Unhandled exception: Fatal Error: Assertion failed tools/cpp/ddm/ddm_assessor.cpp:53: DDM_T::verify_token(token) : Cannot identify the client from function assertion_error in tools/cpp/ddm_report/ddm_report_msg.cpp@465 *** Fatal Error: Program termination requested *** *** Below is the stack trace at the time the error occurred. *** The lines beginning "Err Handler" represent frames relating *** to generating this report. *** The point at which the error occurred is somewhere after these lines. *** There may be a few frames representing standard/library code *** before the Quartus frames begin. *** The search for the error should begin with the Quartus frames. *** Unwinder: libunwind *** Stack depth: 15 Quartus 0x24e67: err_terminator() + 0x1bc (ccl_err) Quartus 0xb036a: __cxxabiv1::__terminate(void (*)()) + 0xa (stdc++) Quartus 0xb03d5: (stdc++) Quartus 0xb0628: (stdc++) Quartus 0x1680d: void ddm_throw<DDM_RUNTIME_ERROR>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x26d (ddm_report) Quartus 0x13fae: DDM_REPORT::DDM_ASSERTION_HANDLER::assertion_error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) const + 0xde (ddm_report) Quartus 0x12a52: DDM_REPORT::ASSERTION_HANDLER::error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) + 0x72 (ddm_report) Quartus 0x13e64: DDM_REPORT::detail::assert_at_line(char const*, char const*, int, char const*, ...) + 0x1b4 (ddm_report) Quartus 0x205fb0: ddm_set_lassessor(DDM_T_ASSESSOR*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x60 (ddm) Quartus 0xf4445: DMS_MANAGER::DMS_MANAGER() + 0x5c5 (dni_dms) Quartus 0xf45b2: DMS_MANAGER::get() + 0x7a (dni_dms) Quartus 0xf6db4: _GLOBAL__sub_I_dms_manager.cpp + 0x58 (dni_dms) Quartus 0x647e: (ld-linux-x86-64) Quartus 0x6568: (ld-linux-x86-64) Quartus 0x202ca: (ld-linux-x86-64) Resolution To work around this problem: For Windows machines Download and unzip the Quartus Prime Pro version zip file that matches your Quartus Prime Pro version from this KDB. Double click on the executable ending in “windows.exe”. When the GUI pops up, press Next. Note that the GUI may look slightly different depending on the version of Quartus you are using. Accept the license agreement Specify the directory where the patch needs to be applied which may be a different location than Quartus install if you have standalone tools in a different directory from your Quartus Prime Pro software installation. Keep “Allow Patch to be uninstalled” selected. Select the software in which to install the patch: The patch will install in the directory of the software or tool you have selected. You will see an uninstall directory for the patch in your software or tool folder where patch is installed; it will contain an executable to uninstall the patch if required for any reason. To confirm patch is installed, you can run quartus_sh -v or corresponding version command for your tool via command line. Alternatively, you can Open Quartus in the GUI and select Help → About Quartus Prime in the main menu. If you are opening up a standalone tool you will navigate to Help-> About <tool_name>. For the Command Line Implementation of the patch in Windows, use the following command: <patch_filename.exe> --mode unattended --installdir <your_install_directory> --accept_eula 1 --patch_to [quartus|qprogrammer|qemb|pta] # An example to patch Quartus Prime Pro Edition Software v25.3: quartus-25.3-0.27-windows.exe --mode unattended --installdir /tmp/altera_pro/25.3 --accept_eula 1 # An example to patch the Standalone Programmer for Quartus Prime Pro Software v25.3: quartus-25.3-0.27-windows.exe --mode unattended --installdir /tmp/altera_pro/25.3 --accept_eula 1 --patch_to qprogrammer For Linux machines: Download and unzip the Quartus Prime Pro version zip file that matches your Quartus Prime Pro version from this KDB. Ensure you run chmod +x on the file ending with linux.run. Run in the command line: ./<installation_patch_run_file>. When GUI pops up, press Next. Note that the GUI may look slightly different depending on the version of Quartus you are using. Accept the license agreement Specify the directory where the patch needs to be applied which may be a different location than Quartus install if you have standalone tools in a different directory from your Quartus Prime Pro software installation. Keep “Allow Patch to be uninstalled” selected. Select the software in which to install the patch: The patch will install in the directory of the software or tool you have selected. You will see an uninstall directory for the patch in your software or tool folder where patch installed; it will contain an executable to uninstall the patch if required for any reason. To confirm patch is installed, you can run ./quartus_sh -v or corresponding version command for your tool via command line. Alternatively, you can Open Quartus in the GUI and select Help → About Quartus Prime in the main menu. If you are opening up a standalone tool you will navigate to Help-> About <tool_name>. For the Command Line Implementation of the patch in Linux, use the following command: ./<patch_filename.run> --mode unattended --installdir <your_install_directory> --accept_eula 1 --patch_to [quartus|qprogrammer|qemb|pta] # An example to patch Quartus Prime Pro Edition v25.3: ./quartus-25.3-0.27-linux.run --mode unattended --installdir /tmp/altera_pro/25.3 --accept_eula 1 # An example to patch the Standalone Programmer for Quartus Prime Pro Software v25.3: ./quartus-25.3-0.27-linux.run --mode unattended --installdir /tmp/altera_pro/25.3 --accept_eula 1 --patch_to qprogrammer This problem has been fixed in Quartus® Prime Pro Edition Software version 26.1. The below table lists the patches that are available and the associated patch number. The patch zip files are attached to the KDB below: Quartus Prime Pro Edition Version Patch Number 23.3 0.52 23.4 0.70 23.4.1 1.01 24.1 0.52 24.2 0.64 24.3 0.35 24.3.1 1.29 25.1 0.36 25.1.1 1.31 25.3 0.27 25.3.1 1.02Why does my Quartus® Prime Installation fail with certificate error: SSL certificate problem: unable to get local issuer certificate (curlcode 60)?
Description Due to a problem in the Quartus® Prime Installer Software, you might see the error message shown below when you click Download & Install. This happens because the certificate bundled with the Quartus® Prime Installer Software is no longer accepted by the Altera® Content Delivery Network (CDN). As a result, secure downloads initiated during the installation process cannot be verified using the outdated certificate. The issue impacts the Installer for the following versions of Quartus software: Operating System Quartus Prime Pro Installer Version(s) Quartus Std/Lite Installer Version(s) Microsoft Windows* 23.3 to 25.3.1 23.1std to 25.1std Linux* 23.3 to 23.4 23.1std The KDB workaround provided below applies to the following versions of Quartus software: Quartus Prime Pro Installer Version(s) Quartus Std/Lite Installer Version(s) KDB workaround applies to 24.3 to 25.3.1 24.1std to 25.1std Note that for all other affected versions not covered by the KDB, you cannot use the installer workaround and must download Quartus software package files individually without using the installer. Separate packages can be found in the Individual Files tab of the Quartus Software Download pages. Resolution To work around this problem, follow these steps: 1. Download and unzip the cacert.zip, which contains the cacert.pem certificate file. 2. Specify the new certificate using one of the following methods: i) Command Line Interface (CLI): Open a command prompt or terminal and run the installer with the--cacert option, pointing to the new certificate file. Windows*: qinst_<version>.exe -sp"--cacert <full path to cacert.pem>" Linux*: qinst_<version>.run -- --cacert <full path to cacert.pem> ii) Graphical User Interface (GUI): - Open the Quartus® Prime Installer, navigate to Settings, locate the CA Certificate Path, and specify the full path to the cacert.pem certificate file. - Then, click Apply > OK. This problem is scheduled to be resolved in a future release of the Quartus® Prime Installer Software.
Can I assign a pull-down or pull-up resistor to an Agilex™ 5 FPGA HPS IO?
Description Yes, Agilex™ 5 FPGA HPS IOs allow to selection of one of the following options: No Pull-down nor pull-up resistor 20K pull-up resistor 50K pull-up resistor 80K pull-up resistor 20K pull-down resistor 50K pull-down resistor 80K pull-down resistor The default value is a 20K pull-up resistor. However, due to a Quartus® Prime Software Suite bug, this setting might not be reflected in the Compilation Report. Resolution The suggested method for assigning a pull-up or pull-down resistor to an Agilex™ 5 FPGA HPS IO is using the Assignment Editor and selecting Weak Pull-Up/Down Select as the Assignment Name. On the other hand, the above-described Quartus® Prime Software Suite bug will be fixed in a future release.Why don’t I get a programming file when I compile with the Quartus® Prime Pro Edition software version 25.1.1?
Description Beginning with version 25.1.1 of the Quartus® Prime Pro Edition software, pin location assignments and I/O standard assignments are required for a programming file to be generated. If these required assignments are missing, no programming file is generated. You must add the required assignments and recompile your design to generate a programming file. If you do not want to generate a programming file, you may ignore this behavior change. To determine whether your design is missing pin location or I/O standard assignments, review your compilation messages. If either of the following messages was generated during your compile, your design is missing pin location or I/O standard assignments that are required to generate a programming file: Critical Warning: Some pins have incomplete I/O assignments. Refer to the I/O Assignment Warnings report for details Critical Warning: No exact pin location assignment(s) for <number> pins of <number> total pins. For the list of pins, please refer to the I/O Assignment Warnings table in the fitter report Resolution Review the I/O Assignment Warnings report, found in the Place sub-section of the Fitter section of the compilation report. Alternately, review the <revision>.fit.plan.rpt report file. For any pins in the I/O Assignment Warnings report that are reported as “Missing location assignment” or “Missing I/O standard,” add the appropriate location or I/O standard assignment. For help making these assignments, refer to Assigning I/O Pins After adding any required assignments, recompile the design to generate a programming file. This change applies to all device families supported by the Quartus® Prime Pro Edition software, beginning in version 25.1.1. Missing pin location or I/O standard assignments are reported as a critical warning, not an error. If you script the compilation of projects, the exit code of the compilation process still indicates success even if pin location or I/O standard assignments are missing, because missing pin location or I/O assignments are reported as a critical warning, not an error.How to run Agilex™ Multiple EMIF Designer Tool in Agilex™ 7 FPGA and SoC FPGA M-Series, Agilex™ 5 FPGA and SoC FPGA, and Agilex™ 3 FPGA and SoC FPGA?
Description You can merge multiple EMIF design examples by configuring the required interconnections using Quartus® Prime Platform Designer. This manual process involves setting up and verifying each connection to ensure proper integration. Resolution To streamline and automate the merging of multiple EMIF designs, use the Agilex™ Multiple EMIF Designer Tool (AMED). This tool simplifies the integration process by handling the configuration steps automatically, reducing the potential for errors and saving time. You can download the AMED tool below. Follow the steps below to utilize the AMED tool: Copy all the *.tcl files into the same directory. Open a terminal: On Windows*, open Command Prompt. On Linux*, open Konsole or your preferred terminal. Navigate to the directory containing the *.tcl files using the cd command. Run the script by entering the command: tclsh multi_emif.tcl Navigating the AMED GUI: Select the number of designs to merge. Browse and add each design’s directory path. Set the output directory for the merged design. (Optional) Check Run Analysis & Synthesis to complete this stage automatically. Click Generate to start merging. Additional Information Note: Ensure that you specify the installation paths for standalone Quartus® environments as applicable: For Windows* standalone installation, provide the path, for example: C:/altera_pro/25.1/quartus For Linux* standalone installation, specify the appropriate installation directory path up to the “quartus” folder (e.g., /path/to/quartus). This step is not required when using Network-Based Quartus® installations on Linux*.What is the latest device firmware for the Agilex® FPGA and Stratix®10 FPGAs?
Description Altera® recommends using the latest version of the Quartus® Prime Pro Edition Software and the latest available device firmware. Please also see the following user guides: Updating the SDM Firmware in the Agilex® 7 FPGA Configuration User Guide Updating the SDM Firmware in the Stratix® 10 FPGA Configuration User Guide Resolution The latest device firmware available for the Quartus® Prime Pro Edition Software can be downloaded from the following links: Quartus Prime Pro Edition Software version 25.3 What is the latest device firmware for the Quartus® Prime Pro Edition Software version 25.3? Quartus Prime Pro Edition Software version 25.1 What is the latest device firmware for the Quartus® Prime Pro Edition Software version 25.1? Quartus Prime Pro Edition Software version 24.3.1 What is the latest device firmware for the Quartus® Prime Pro Edition Software version 24.3.1? Quartus Prime Pro Edition Software version 24.3 What is the latest device firmware for the Quartus® Prime Pro Edition Software version 24.3? Quartus Prime Pro Edition Software version 24.2 What is the latest device firmware for the Quartus® Prime Pro Edition Software version 24.2? Quartus Prime Pro Edition Software version 24.1 What is the latest device firmware for the Quartus® Prime Pro Edition Software version 24.1? Quartus Prime Pro Edition Software version 23.4 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 23.4? Quartus Prime Pro Edition Software version 23.3 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 23.3? Quartus Prime Pro Edition Software version 23.2 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 23.2? Quartus Prime Pro Edition Software version 23.1 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 23.1? Quartus Prime Pro Edition Software version 22.4 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 22.4? Quartus Prime Pro Edition Software version 22.3 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 22.3? Quartus Prime Pro Edition Software version 22.2 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 22.2? Quartus Prime Pro Edition Software version 22.1 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 22.1? Quartus Prime Pro Edition Software version 21.4 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 21.4? Quartus Prime Pro Edition Software version 21.3 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 21.3? Quartus Prime Pro Edition Software version 21.2 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 21.2? Quartus Prime Pro Edition Software version 21.1 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 21.1? Quartus Prime Pro Edition Software version 20.3 What is the latest device firmware available for the Quartus® Prime Pro Edition Software version 20.3?When does the Quartus® Prime Design Software, IP cores, and Questa*-Intel® FPGA Edition Software check out a license?
Description Below is a description of how the Quartus® Prime Design Software, IP cores, and Questa*-Intel® FPGA Edition Software utilize licenses: Resolution Quartus® Prime Design Software: All Quartus® Prime Design Software processes check for a valid license, including the Quartus® GUI, Analysis & Synthesis, Assembler, and TimeQuest Timing Analyzer. These processes start only if a valid license is available. They do not hold or occupy the license; they only validate that one is available. However, the Fitter checks out a license when it starts and holds it for the duration of the Fitter process. IP cores: A license for an IP core is checked out when the Quartus® Prime Design Software opens the first encrypted file of the IP core for synthesis. This license is held for the duration of synthesis. The Assembler checks out the license for every IP core to create the programming file and holds it for the duration of the Assembler process. Questa*-Intel® FPGA Edition software: Once Questa*-Intel® FPGA Edition Software loads a design unit during elaboration, a Questa-Intel® FPGA Edition license is checked out. It remains checked out until the simulation ends (quit -sim), or the simulator is closed. Once a waveform is loaded into the simulator, a Questa*-Intel® FPGA Edition Software license is also checked out for viewing Wave Log Format File (.wlf), and it remains checked out until the waveform window is closed. Related Articles What happens to a license if the Quartus II software terminates unexpectedly? Can I perform multiple compilations using the Quartus II software at the same time on one computer with a one seat floating license or one fixed (node locked) license file?Why are GTS transceiver tests including PCIe* enumeration failing on the Agilex™ 5 FPGA E-Series 065B Modular Development Kit (MK-A5E065BB32AES1)?
Description Due to a change in the Agilex™ 5 FPGA E-Series 065B Modular Development Kit (MK-A5E065BB32AES1) manufacturing test process, some boards have a corrupted FPGA image stored in the FPGA QSPI flash. This corrupt image results in failures in transceiver operation even if a new image is loaded via JTAG. Examples of issues include failure of the PCIe* to enumerate and SFP transceiver loopback tests failing. Resolution To fix this problem, follow these steps Ensure that the MAX® 10 FPGA POF image is updated as described in this KDB: Why does the GTS AXI Streaming IP for PCI Express* design example for Agilex™ 5 FPGAs fail to operate and enumerate in hardware when loaded from QSPI on the Agilex™ 5 FPGA E-Series 065B Modular Development Kit (MK-A5E065BB32AES1)? Download ghrd_a5ed065bb32ae6sr0_hps.jic to a host computer with the Quartus® Prime Pro Edition Programmer v25.3 or newer to update the Agilex™ 5 FPGA E-Series 065B Modular Development Kit FPGA QSPI flash. Set the Agilex™ 5 FPGA Modular Development Kit carrier board switch S13-3 and S13-4 to "OFF" so the USB JTAG option is selected and the Agilex™ 5 FPGA is on the JTAG chain. See switch setting in this photo: Connect the micro USB cable to the Agilex™ 5 FPGA Modular Development kit front panel JTAG connector (J35) and attach other end to host computer. Bring up the Quartus® Prime Pro Edition (25.3 or newer) Programmer GUI, select "Auto Detect" . Your display should be similar to the one shown below: Select the A5EC065BB32 device, right click and change file to ghrd_a5ed065bb32ae6sr0_hps.jic. Select "Program/Configure" and "Verify" for the MT25QU02G device as shown below: Click "Start" to begin the programming process. The programming process takes approximately 5 minutes to complete. Power cycle the board for the new image to be loaded. This manufacturing problem is resolved in production versions of the Agilex™ 5 FPGA Modular Development Kit.Why do I get an error in generating programming files, and it shows as an invalid license for Nios® V Processor for FPGA in the Quartus® Prime Pro Edition Software version 24.1?
Description As FPGA Intellectual Property (IP) solutions have replaced Nios® V Processor for FPGA for IPs from the Quartus® Prime Pro Edition Software version 24.1 version, you may encounter an error while generating programming files. To resolve this, ensure to install Nios V Processor for FPGA no-cost license before using the below mentioned list of IPs. Please get in touch with the customer support team for additional information on how to download the free license. List of IPs requiring Nios® V Processor for FPGA free license: F-Tile Ethernet Multirate FPGA IP F-Tile CPRI PHY Multirate FPGA IP F-Tile PMA/FEC Direct PHY Multirate FPGA IP Ethernet Subsystem FPGA IP (F-Tile & E-Tile) E-tile Dynamic Reconfiguration Suite [Applicable only to Design Example] Serial lite III Streaming FPGA IP [Applicable only to Design Example] F-Tile Dynamic Reconfiguration Suite FPGA IP GTS Dynamic Reconfiguration Controller FPGA IP (Agilex™ 5) SDI II FPGA IP (Applicable only to Design Example) HDMI FPGA IP (Applicable only to Design Example) DisplayPort FPGA IP (Applicable only to Design Example) Error Message: Error(23714): Can not generate programming files for your current project because you do not have a valid license. Visit the Intel FPGA Self-Service Licensing Center at https://licensing.intel.com. Warning(115005): Unlicensed IP: "Nios V/g General Purpose Processor Intel FPGA IP (6AF7 018C)" Warning(115004): Unlicensed encrypted design file: "C:/Users/*” - Intel Resolution To work around this problem in the Quartus® Prime Pro Edition Software version 24.1, follow the steps below to Obtain Nios® V Processor for FPGA no cost license. Go to: https://licensing.intel.com/psg/s/?language=en_US (a registered account is needed) Select Sign up for evaluation or no cost licenses Select the license needed and click Next. Choose an already existing computer or create a new one (NIC ID of PC is needed https://www.intel.com/content/www/us/en/docs/programmable/683472/23-4/identifying-host-s-nic-id.html) Read and accept the terms of use, then click Generate. License is generated and sent to the account email address. Add the license file to Quartus Tools > License Setup > License File. To ensure license installation, re-run the assemblerError(23098): One or more blocks are configured incorrectly and will not have the desired functionality. --BCM instance name: pio_1_1
Description You may encounter the below fitter error when designing with the Agilex™ 5 FPGA MIPI D-PHY IP in Quartus® Prime Pro Edition version 24.1 when using a specific reference clock frequency and bit rate combination. Error(23098): One or more blocks are configured incorrectly and will not have the desired functionality. --BCM instance name: pio_1_1 Error(12274): A critical error occurred while the periphery placement was committed to the atom netlist. The atom netlist is now invalid, and the Fitter must be restarted. Resolution These errors are caused by an invalid combination of reference clock frequency and operating bit rate. These combinations will be removed in a future release of the Quartus® Prime Pro Edition Software.
