Why Do I Receive the Critical Warning IPC-40026: System Clock Frequency Mismatch in a GTS SDI II Design with Dynamic Reconfiguration?
Description Due to an issue in Quartus® Prime Pro Edition Software version 26.1.1, a critical warning may be displayed when using the GTS SDI II Design Example. This warning occurs because the SysPLL parameter is configured with the GTS PMA/FEC Direct PHY IP (TX/RX Simplex) settings instead of the GTS PMA/FEC Direct PHY IP (Dynamic Reconfiguration) settings. Resolution This warning can be safely ignored, as it does not affect the functionality or operation of the design. This problem is scheduled to be fixed in a future release of Quartus Prime Pro Edition software.Why is there "sopcinfo2swinfo.exe: command not found" when running sopc-create-header-files under WSL, or Docker under Windows?
Description An error message like this: sopc-create-header-files: line 182: sopcinfo2swinfo.exe: command not found sopc-create-header-files: sopcinfo2swinfo.exe --input=./peripheral_subsys.sopcinfo --output=/tmp/sopc-create-header-files.1312.tmp.swinfo failed will be seen in the Quartus ® Prime Pro Edition Software version 25.3.1 and earlier, when using the sopc-create-header-files script within the Linux version of the Quartus ® Prime Pro Edition Software, running on the Microsoft* Windows operating system. The Linux version of the tools can be installed under Windows* using WSL, WSL2 or Docker. In all of these cases, the sopc-create-header-files script detects that it is running under Windows* and looks for an internal tool with the suffix “.exe”. However, since the Linux version has been installed, the tool does not have that suffix and so cannot be found by the sopc-create-header-files script. Resolution To work around the problem, either switch to using a Windows* installation of the Quartus® Prime Pro Edition Software, or follow these steps to continue using the Linux installation under Windows*: Under Linux, use the command “which sopc-create-header-files” to find the location of the script. Copy the script from this location to another location of your choice. Make the newly copied script version writable using the command: chmod +w <path to newly copied script> Modify your newly copied script version. Find the following line: windows_exe=.exe and either remove it or add a single # symbol at the start to comment it Use your newly modified version of the script instead of the installed version. This will now execute correctly.Why does GD55LB02GE QSPI flash fail in Linux* in FPGA SoC device?
Description If you use Linux* version between socfpga-6.0 and socfpga-6.12.43-lts with GD55LB02GE QSPI flash, you may fail to mount the file system in Linux if it’s stored in GD55LB02GE. This is caused by the gigadevice.c in these versions. Resolution This issue is fixed in socfpga-6.12.43-lts and afterwards. You can upgrade Linux source code to this version, or comment out the GD55LB02GE entry in gigadevice.c in old versions.Why does Ashling* RiscFree* IDE for Altera* FPGA software reports unresolved inclusion warnings, despite a successful build of Nios® V processor software project?
Description Due to a problem in multiple versions of Ashling* RiscFree* IDE for Altera® FPGA, the unresolved inclusion warning might occur for any Nios ® V processor software projects. Note that, the warning is harmless. The affected software project will still build successfully. This is caused by a bug in the Indexer of Ashling* RiscFree* IDE, which fails to search for the relevant project files. The affected Ashling* RiscFree* IDE for Altera FPGA are: Software version v25.1.1 (dated as 31 st Jan 2025) Software version v25.2.1 (dated as 9 th May 2025) Software version v25.3.1 (dated 1 st August 2025) Resolution This problem is currently scheduled to be resolved in future release of Ashling* RiscFree* IDE for Altera FPGA software version v26.1.0 (dated as 19 th Dec 2025). Meanwhile, you may safely ignore this warning, as it does not affect the functionality of your project. If needed, please refer to the related article for the recommended workaround. Related Article: Ahsling RiscFree IDE 25.1.1: Unresolved inclusion | Altera CommunityWhy do I get "Fatal Error: Access Violation at" when running quartus_syn or quartus_fit?
Description Due to a problem in the Quartus® Prime Pro Edition Software versions 26.1 and earlier, and Quartus Prime Standard Edition Software versions 25.1 and earlier, compilation may terminate with a "Fatal Error: Access Violation" message during synthesis or fitting. This failure can occur intermittently, and the reported memory address may change between compilation runs. You may observe one or more of the following behaviors: Quartus® compilation fails during synthesis or fitting The failure may occur in either of the following modules: quartus_syn (during synthesis) quartus_fit (during fitting) The error message is similar to: *** Fatal Error: Access Violation at <<ADDRESS>> The reported memory address may change between runs. The fatal error is followed by a stack trace that includes one of the failure signatures listed below. CDB_SGATE_OTERM::adopt_fanouts HDB_ASGN_CONTAINER::remove_assignment LUTIL_DEVICE::get_fragment_from_subloc STA_NODE::reset_tag_heads DESIGN_HDB_ASSIGNMENT_CONVERTER::cleanup_after_conversion BSYN_RTM_FLOP::IsExpired RTM_ATOM_MGR::rip_out_simple_ff_for_bypass IRTM_FF_QUEUE::remove_ff PTI_BCM_TIMING_GRAPH::push_back_carry_hipi_clock_iterm FTM_TREE_NODE::num_sgates Stack traces may differ, even when compiling the same design. Specific Failure Signatures: Synthesis failure (quartus_syn): The crash report includes the following function call: RTL_ADDER::aggressive_adder_balancing Fitter failure (quartus_fit): The error occurs very early after the fitter starts, and the crash report includes the following function call: qhd_reread_global_assign_from_qsf Error Log Examples Stack Trace example for crashes in quartus_syn *** Fatal Error: Access Violation at 00007FFB92E2C63E Module: quartus_syn.exe Stack Trace: Quartus 0xc63d: CDB_SGATE_OTERM::adopt_fanouts + 0x2d (db_cdb_sgate) Quartus 0x117e7: RTL_ADDER::shrink_iports + 0x1f7 (SYNTH_OPT) Quartus 0x14a75: RTL_ADDER::create_binary_adder + 0x49e9 (SYNTH_OPT) Quartus 0x45910: RTL_ADDER::restrict_adder_network + 0x84a (SYNTH_OPT) Quartus 0x4f5d6: RTL_ADDER::aggressive_adder_balancing + 0x9d (SYNTH_OPT) Quartus 0x11533: RTL_SCRIPT::call_common_rtl_fns + 0x1043 (SYNTH_OPT) Quartus 0x115b5: RTL_SCRIPT::call_named_function + 0x8a2 (SYNTH_OPT) Quartus 0x3a87a: RTL_SCRIPT::process_script + 0x62c (SYNTH_OPT) Quartus 0x3a8e4: run_parallel_rtl + 0x1db4 (SYNTH_OPT) Quartus 0x8509d: SYNTH_QIS::SYNTHESIS_FLOW::run_parallel_rtl_in_helper_processes + 0x285 (synth_qis) Quartus 0x850d5: SYNTH_QIS::SYNTHESIS_FLOW::high_level_synthesis + 0x47d (synth_qis) Quartus 0x8546d: SYNTH_QIS::SYNTHESIS_FLOW::run_current_phase + 0x286 (synth_qis) Quartus 0x854d4: SYNTH_QIS::SYNTHESIS_FLOW::run_full_flow + 0x30d (synth_qis) Quartus 0x859b7: QIS_RTL_STAGE_IMPL::synthesize + 0x467 (synth_qis) Quartus 0x15b55: qis_synthesize + 0x245 (synth_qis) Quartus 0x16442: TclNRRunCallbacks + 0x62 (tcl86) Quartus 0x16f4d: TclEvalEx + 0x9ed (tcl86) Quartus 0xa6ab8: Tcl_FSEvalFileEx + 0x22b (tcl86) Quartus 0xa5136: Tcl_EvalFile + 0x36 (tcl86) Quartus 0x15246: qexe_evaluate_tcl_script + 0x4e6 (comp_qexe) Quartus 0x1143b: qexe_do_tcl + 0x46b (comp_qexe) Quartus 0x1a70e: qexe_run_tcl_option + 0x5ee (comp_qexe) Quartus 0x16451: QCU::DETAIL::initialize_qhd_and_run_qexe + 0xa1 (comp_qcu) Quartus 0x1f8e2: qcu_run_tcl_option + 0x2f2 (comp_qcu) Quartus 0x1b1ba: qexe_standard main + 0x26a (comp_qexe) Quartus 0x29eb: qexe_run + 0x3eb (comp_qexe) Quartus 0x1192p: qsyn2_main + 0x1a9p (quartus_syn) Quartus 0x1e808: msg_main_thread + 0x18 (CCL_MSG) Quartus 0x17021: msg_thread_wrapper + 0x71 (CCL_MSG) Quartus 0x1c89d: mem_thread_wrapper + 0x70 (CCL_MEM) Quartus 0x1b49d: msg_exe_main + 0x20d (CCL_MSG) Quartus 0x2b6c: __scrt_common_main_seh + 0x11c (quartus_syn) Quartus 0x2e8d6: BaseThreadInitThunk + 0x16 (KERNEL32) Quartus 0x5b3b: RtlUserThreadStart + 0x2b (ntdll) End-trace Stack Trace example for crashes in quartus_fit *** Fatal Error: Access Violation at 00007FFB8F79CFF7 Module: quartus_fit.exe Stack Trace: Quartus 0x1cff6: HDB_ASGN_CONTAINER::remove_assignment + 0x52 (DB_HDB) Quartus 0x1cf71: HDB_ASGN_CONTAINER::destroy_assignment + 0x31 (DB_HDB) Quartus 0xca69c: anonymous namespace::delete_all_global_assignments + 0x25c (comp_qhd) Quartus 0xcc344: qhd_reread_global_assign_from_qsf + 0x384 (comp_qhd) Quartus 0x51679: QHD_DATABASE_UTILS::load_design + 0x449 (comp_qhd) Quartus 0x1e1e0: FIT2_DATABASE_EXPERT_QDB::load + 0x5b0 (comp_fit2) Quartus 0x3xee: fit2_create_fitter_netlist + 0x3xee (comp_fit2) Quartus 0x16442: TclNRRunCallbacks + 0x62 (tcl86) Quartus 0x16f4d: TclEvalEx + 0x9ed (tcl86) Quartus 0xa6ab8: Tcl_FSEvalFileEx + 0x22b (tcl86) Quartus 0xa5136: Tcl_EvalFile + 0x36 (tcl86) Quartus 0x15246: qexe_evaluate_tcl_script + 0x4e6 (comp_qexe) Quartus 0x1143b: qexe_do_tcl + 0x46b (comp_qexe) Quartus 0x1a70e: qexe_run_tcl_option + 0x5ee (comp_qexe) Quartus 0x16451: QCU::DETAIL::initialize_qhd_and_run_qexe + 0xa1 (comp_qcu) Quartus 0x1f8e2: qcu_run_tcl_option + 0x2f2 (comp_qcu) Quartus 0x29eb: qexe_run + 0x3eb (comp_qexe) Quartus 0x16f2d: qfit2_main + 0x82d (quartus_fit) Quartus 0x1e808: msg_main_thread + 0x18 (CCL_MSG) Quartus 0x17021: msg_thread_wrapper + 0x71 (CCL_MSG) Quartus 0x1c89d: mem_thread_wrapper + 0x70 (CCL_MEM) Quartus 0x1b49d: msg_exe_main + 0x20d (CCL_MSG) Quartus 0x2b6c: __scrt_common_main_seh + 0x11c (quartus_fit) Quartus 0x2e8d6: BaseThreadInitThunk + 0x16 (KERNEL32) Quartus 0x5b3b: RtlUserThreadStart + 0x2b (ntdll) End-trace Resolution This problem is currently scheduled to be resolved in a future release of the Quartus Prime Pro Edition Software and the Quartus Prime Standard Edition Software. If you are using Quartus Prime Pro Edition Software version 26.1, apply the attached patch for your operating system: Download the Linux or Windows patch package for your platform. On Linux, install the patch package from the console. On Windows, run the patch executable file. Confirm the installation by opening the Quartus Prime GUI and checking the About window, or by running: quartus_sh -v If applying the patch is not possible, or if you need assistance with other Quartus Prime software versions, contact your local Altera support representative. Additional Information Affected software: Quartus Prime Pro Edition Software version 26.1 and earlier Quartus Prime Standard Edition Software version 25.1 and earlierWhy aren’t HSSI analog parameter values set in the GTS PMA registers when these values are enabled and set in the PMA/FEC Direct PHY IP GUI?
Description Due to a problem in the Quartus® Prime Pro Edition software version 24.3, HSSI analog parameter values listed below aren’t reflected in the GTS PMA registers even you set these analog parameters in the GTS PMA/FEC Direct PHY IP GUI. Enable RX P&N Invert, Enable TX P&N Invert RX External Coupling Mode Selects value of RX On-chip Termination Resolution To overcome the problem, you can use the QSF setting methodology to set the analog parameters in your .qsf file for both the RX on-chip termination and RX External Coupling Mode settings. For TX and RX polarity inversion pins, you can follow the PMA/FEC Direct PHY IP User Guide on the GTS Attribute access method to change the TX and RX polarity pins. This problem is scheduled to be fixed in a future release of Quartus Prime Pro Edition software.Why does the Linux shows "Cannot enable. Maybe the USB cable is bad?" error message when a USB 3.1 thumb-drive is plugged-in?
Description In Quartus® Prime software of version 25.3 and older, you may see the error message “Cannot enable. Maybe the USB cable is bad?” when a USB 3.1 thumb-drive is plugged-in. This is due to an incorrect Phase Locked-Loop Bandwidth configuration in PMA direct mode for USB, which caused the instability in USB 3.1 link layer when reaching the U0 state. This issue has been fixed in the newer Quartus® software releases. Resolution To solve this issue, upgrade your Quartus® software to Quartus® Prime Pro 25.3.1 version or newer versions.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 is there a failure in the design if we are doing design migration for Agilex™ 3/ Agilex™ 5 FPGA from the Quartus® Prime Pro Edition software version 25.1.1 to 25.3?
Description Due to new implementation of the input reference clock buffer protection, there are additional ports being added in the reset sequencer IP, and some of the ports are being renamed from the Quartus® Prime Pro Edition software version 25.1.1 to 25.3. User will need to update the RTL with the updated ports name, if they have GTS Reset Sequencer IP ports connected to their IPs. Resolution For a workaround, users will require to update the existing port name to the new ports that are available in the Reset Sequencer IP. The existing ports that will require update will be: i_refclk_bus_out (in 25.1.1) --> i_src_rs_refclk_status_bus_out (in 25.3) o_shoreline_refclk_fail_stat (in 25.1.1) --> o_refclk_fail_status (in 25.3)Why is the Ethernet MDIO IP unavailable in the IP Catalog and Platform Designer of Quartus® Prime Pro Edition Software version 26.1 for Agilex® 5 FPGA and Agilex® 3 FPGA designs?
Description From Quartus® Prime Pro Edition Software versions 24.1 through 26.1, the Ethernet MDIO IP is not available in the IP Catalog for Agilex® 5 FPGA and Agilex® 3 FPGA devices because support for these device families has not been enabled for the IP. Resolution A patch is available to resolve this issue in Quartus® Prime Pro Edition Software version 26.1. To install the fix: Download Patch 0.29 for your operating system. Install Patch 0.29 into your Quartus® Prime Pro Edition Software version 26.1 installation. The patch files are available below: Patch 0.29 for Windows (.exe) Patch 0.29 for Linux (.run) After installing the patch, the Ethernet MDIO IP will be available in the IP Catalog for Agilex® 5 FPGA and Agilex® 3 FPGA designs.
