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.
Why isn’t a programming (SOF) file generated for the F-Tile Dynamic Reconfiguration Suite IP available for Example Designs when using the Quartus® Prime Pro Edition software versions 25.3 and earlier?
Description Due to starting from the Quartus® Prime Pro Edition software version 25.3 and earlier, it is compulsory to connect all the I/O ports to the correct PIN location. If any of the design I/O ports are floating and not properly connected, Quartus software will not be able to generate the programming file for the design compiled. This is mentioned in the Quartus Prime Pro Edition User Guide version 25.1.1 in 1.2. Generating Secondary Programming Files and provide the guidelines to the user on how to fix the Quartus software critical warning and successfully create the programming file for your design. Why don’t I get a programming file when I compile with the.... Similar programming (SOF) file generation problem you may observe when you generate the F-Tile Dynamic Reconfiguration Suite IP Example Designs by selecting Target Development Kit with option 1) Agilex™ 7 FPGA I-Series Transceiver-SoC Development Kit (Production 1 4xF-Tile) DK-SI-AGI027FA or 2) Agilex 7™ FPGA I-Series Transceiver-SoC Development Kit (Production 2 4xF-Tile) DK-SI-AGI027FC. As shown in the figure below. Resolution As a workaround, generate the F-Tile Dynamic Reconfiguration Suite IP Example Designs by selecting the Target Development Kit with the option you want and compiling the design. Review the I/O Assignment Warnings report, found in the Place sub-section of the Fitter section of the compilation report. Alternatively, 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 problem is scheduled to be fixed in a future release of the Quartus® Prime Pro Edition software.Why does the ASMI Parallel II IP or the Generic Quad SPI Controller II IP fail to access a QSPI flash memory device?
Description Due to a problem in multiple Quartus® Prime Pro Edition and Standard Edition software versions, the ASMI Parallel II IP or the Generic Quad SPI Controller II IP fails to access a Quad SPI flash memory device. The affected software versions are: Quartus® Prime Pro Edition software versions from 22.1 to 25.3 Quartus® Prime Standard Edition software versions from 22.1 to 24.1 Chronologically, Prior to version 22.1, the initial state of DATA[3:2] was high. For the affected software versions, the initial state of DATA[3:2] was incorrectly changed to Hi-Z. For reader’s information, some quad SPI flash memory devices support RESET or HOLD function on DATA[3] and WRITE_PROTECT function on DATA[2]. DATA pins can be known as DATA, DQ, IO, or SIO across different QSPI flash memory device vendors. This modification to Hi-Z is recognized as low, thus the active-low RESET, HOLD and WRITE_PROTECT functions are enabled. With these, they prevent the flash controller IP from gaining access to flash devices. Resolution DATA[3:2] must be kept high as the initial state. If the targeted flash device is the Active Serial configuration flash memory, this problem is fixed starting from, Quartus® Prime Pro Edition software version 25.3.1, and Quartus® Prime Standard Edition software version 25.1. Otherwise (i.e. generic-purpose flash memory or affected software version), please refer to the workarounds below. For affected software versions, Targeted Flash Device Workarounds Active Serial configuration flash memory Differentiated with: DATA[3:2] pins are assigned to dedicated AS_DATA[3:2] pins Disable dedicated Active Serial interface option is turned off The initial state of DATA[3:2] is Hi-Z. Add external pull-up registers to the I/O VCC voltage on DATA[3:2]. Internal weak pull-up resistor option is unavailable for dedicated AS_DATA pins. Generic-purpose flash memory Differentiated with: DATA[3:2] pins are assigned to generic I/O pins Disable dedicated Active Serial interface option is turned on The initial state of DATA[3:2] is Hi-Z. Add external pull-up registers to the I/O VCC voltage on DATA[3:2], or Enable internal weak pull-up resistor on DATA[3:2] pins in Quartus® design project After Quartus® Prime Pro Edition software version 25.3.1 and Quartus® Prime Standard Edition software version 25.1, Targeted Flash Device Workarounds Active Serial configuration flash memory Differentiated with: DATA[3:2] pins are assigned to dedicated AS_DATA[3:2] pins Disable dedicated Active Serial interface option is turned off The initial state of DATA[3:2] is reverted to high. No workaround is needed. Generic-purpose flash memory Differentiated with: DATA[3:2] pins are assigned to generic I/O pins Disable dedicated Active Serial interface option is turned on The initial state of DATA[3:2] is Hi-Z. Add external pull-up registers to the I/O VCC voltage on DATA[3:2], or Enable internal weak pull-up resistor on DATA[3:2] pins in Quartus® design project Related IP Cores ASMI Parallel II IP, Generic Quad SPI Controller II IPGeneration of AOCL Report Failed with below error
Description Due to a problem in the FPGA Support Package for the oneAPI DCP++/C++ Compiler version 2024.2, you might see this error. Generation of AOCL Report Failed with the below error PLEASE submit a bug report to https://software.intel.com/en-us/support/priority-support and include the Stack dump: … aocl-opt 0x0000XXXXXXXXXXXX llvm::AccessGroupInfo::hasIndependentAGsOrSafelen(llvm::Loop*, llvm::Instruction*, llvm::Instruction*, int&) + 195 … or … aocl-opt: XXXXXXXX: llvm::Value::~Value(): Assertion `materialized_use_empty() && "Uses remain when a value is destroyed!"' failed. … Resolution To work around this problem, download and install the 2024.2.1 patch for the FPGA Support Package below. Determine where the 2024.2 Intel oneAPI DCP++/C++ Compiler is installed. The FPGA Support Package will be located inside of the compiler installation directory in the ‘oclfpga’ folder. For Linux, this will be ‘<install-dir>/intel/oneapi/compiler/2024.2/opt/oclfpga’, where <install-dir> is typically either ‘/opt’ or ‘~’. For Windows, this will usually be ‘C:\Program Files (x86)\Intel\oneAPI\compiler\2024.2\opt\oclfpga’. Rename the existing ‘oclfpga’ directory to something else, e.g., ‘oclfpga.bak’ or ‘oclfpga.prev’. Unpack the given archive, .tar.gz for Linux and .zip for Windows, to extract the ‘oclfpga’ folder and place it in ‘intel/oneapi/compiler/2024.2/opt’. (Optional) Remove the backup folder created in Step ‘2’ after testing. This problem is scheduled to be fixed in a future release of the FPGA Support Package for the oneAPI DCP++/C++ Compiler.Why is my IP license checked out and not released after using the Signal Tap Logic Analyzer?
Description Due to a problem in the Quartus® Prime Pro Edition Software version 25.3, you might see that an IP license is checked out and not released when using the Signal Tap Logic Analyzer. Resolution To work around this problem, use the standalone version of the Signal Tap Logic Analyzer. This problem is scheduled to be fixed in a future release of the Quartus® Prime Pro Edition Software.Why does downloading ELF file into Nios® V/g processor fail when disabled branch prediction, while enabled instruction cache?
Description Due to a problem in the Quartus ® Prime Pro Edition Software version 25.3.1, downloading ELF file into Nios ® V/g processor might fail when both the conditions below are fulfilled. Branch prediction is disabled, and Instruction cache is enabled The niosv-download command returns the error message below. Unexpected vCont reply in non-stop mode: E30 ERROR: GDB failed. This is because there is an RTL bug in the instruction cache related to its reset state. Resolution To work around this problem in the Quartus ® Prime Pro Edition Software version 25.3.1, Either enable branch prediction, Or disable instruction cache This problem is scheduled to be fixed in a future release of the Quartus ® Prime Pro Edition Software version 26.1.Why do I see multiple drivers to always_ff output variable errors in the Cadence Xcelium simulation for the Agilex™ 7 FPGA F-Tile PMA/FEC Direct PHY IP Example designs?
Description Due to a problem in the Quartus® Prime Pro Edition Software version 25.1.1, you will see errors when you run Cadence Xcelium simulation on the F-Tile PMA/FEC Direct PHY IP Example Designs about multiple drivers to always_ff output variable. Resolution To work around this problem in the Quartus® Prime Pro Edition software version 25.1.1, add below command in example_design/testbench/run_xcelium.sh: xmelab -warn_multiple_driver -relax -timescale '1 ps / 1 fs' -genhier -access +rwc top_tst This problem is fixed beginning with the Quartus® Prime Pro Edition software version 25.3.Error: Tcl error: DVR_API: List of error MSGs are {list element in braces followed by "]" instead of space
Description Due to a problem in the Quartus® Prime Pro Edition Software version 25.3.1, you might see this error when compiling your design in Design Space Explorer II. Error: Tcl error: DVR_API: List of error MSGs are {list element in braces followed by "]" instead of space (Command was: lmap panel_name [::qed_lib::rdb_util::get_report_panel_names_matching -panel_name {} -string_match {Synthesis||Logic Synthesis Stage||Partition*||*Optimization Results||Multiplier Implementations||Multiplier Implementation Report} -regexp_match {}] {::qed_lib::rdb_util::get_report_panel_str -panel_name $panel_name})} Resolution To work around this problem in the Quartus® Prime Pro Edition Software version 25.3.1, download and install patch 1.21 This problem is scheduled to be resolved in a future release of the Quartus® Prime Pro Edition Software.Error(24244): Found an error when generating the IBIS Output File for board analysis
Description Due to a problem is Quartus® Prime Pro Edition Software version 25.3, you might see this error when generating this IBIS files. This problem only occurs on Windows* OS. This problem occurs because the quartus_py.exe file has changed location in the installation directory but the IBIS writer still calls the file from the previous location. Resolution To work around this problem, copy the file quartus_py.exe from this directory \altera_pro\25.3\qcore\bin64\quartus_py.exe to this one \altera_pro\25.3\quartus\bin64\quartus_py.exe This problem is scheduled to be fixed in a future release of the Quartus® Prime Pro Edition Software.
