HELICS Logo
  • HELICS Quick Start
    • Install HELICS and the Python Language Binding
    • Confirm installation
    • Clone in the HELICS Examples Repository
    • Navigate to the “Fundamental Default” example
    • Run the Fundamental Default Example
    • Next Steps
  • User Guide
    • Orientation
    • HELICS Installation
      • Installing the Pre-Compiled Libraries
      • Install using Spack (macOS, Linux)
      • OS Specific installation from source
        • Windows Installation
        • Mac Installation
        • Linux Installations
        • Docker
        • HELICS with language bindings support
        • Linking with the HELICS Library
        • HELICS CMake options
      • Package Manager
        • Install using pip (Windows, macOS, Linux, other)
        • Install using Spack (macOS, Linux)
        • Troubleshooting shared library errors on Windows
      • HELICS Installation Methods
        • Build from source
        • Python via pip install
        • matHELICS install
        • Julia install
        • pip install
        • jHELICS
        • nimble install
        • C# install
        • Download pre-compiled
        • spack install
      • Running an Example
      • HELICS runner
    • HELICS User Tutorial
      • Co-Simulation Overview
      • Fundamental Topics
        • HELICS Terminology
        • Federates
        • Federate Interface Configuration
        • Timing Configuration
        • Co-simulation Stages
        • Logging
        • Running HELICS Co-Simulations
        • Simulator Integration
      • Advanced Topics
        • Aliases
        • Co-simulation Architectures
        • Broker Hierarchies
        • Callbacks
        • Callback Federates
        • Command Interface
        • Connector Federate
        • Core Types
        • Dynamic Federations
        • Encrypted Communication
        • Environment variables
        • Iteration
        • Multi-Protocol Broker
        • Multi-Computer Co-simulations
        • Multi-Source Inputs
        • Configuration in Complex Networks
        • Orchestration for HPC systems
        • Terminating HELICS
        • Profiling
        • Queries
        • Simultaneous Co-simulations
        • Targeted Endpoints
        • Timeouts
        • Introduction
        • Translators
        • Interacting with a Running Simulation
    • Examples
      • Fundamental Examples
        • Base Example Co-Simulation
        • Federate Integration with PyHELICS API
        • Federate Message + Communication Configuration
      • Advanced Examples
        • Default Advanced Example
        • Brokers - Simultaneous Co-simulations
        • Brokers - Hierarchies
        • Brokers - Multi-Protocol Brokers
        • Brokers - Multi-computer Co-simulation
        • Federation Queries
        • Multi-Input
        • Monte Carlo Co-Simulations
        • Iteration
        • FMUs with HELICS
        • Asynchronous (non-blocking) Time Request
        • helics_connector
      • Examples in Supported Languages
        • User Guide Advanced Default Example
        • Other Examples
      • Miscellaneous Examples
        • GridLAB-D Example 1
    • Support
  • Developer Guide
    • Style Guide
      • Naming Conventions
    • Generating SWIG extension
    • Run tests
    • Generating Documentation
    • HELICS Benchmarks
      • Baseline benchmarks
        • ActionMessage
        • Conversion
      • Simulation Benchmarks
        • Echo
        • Echo_c
        • Echo Message
        • Filter
        • Ring Benchmark
        • Ring Message Benchmark
        • Timing Benchmark
      • Message Benchmarks
        • MessageLookup
        • MessageSend
      • Standardized Tests
        • PHold
      • Multinode Benchmarks
    • Description of the different continuous integration test setups running on the CI servers
      • Appveyor tests
      • Azure tests
      • Circle CI
        • Benchmark tests
      • GitHub Actions
      • Drone
      • Cirrus CI
      • Read the docs
      • Codacy
    • (Planned) CI/CD Infrastructure
      • Continuous Integration
        • Linux
        • Windows
        • macOS
        • ARM
        • FreeBSD
        • Valgrind [daily]
        • Code Coverage [daily]
        • Sanitizers
        • Documentation
      • Static Analysis, Linting, and Automatted Code Maintenance
        • pre-commit
        • Updating generated interface files and docs
      • Automated Releases
      • Multinode Tests and Benchmarks
      • Community Server
    • Porting Guide: HELICS 2 to 3
      • Dependency changes
      • Code changes
        • PRs with breaking changes
        • Application API (C++17)
        • Command line interfaces
        • C Shared API
        • C++98 API (wrapper around the C Shared API)
        • Queries
        • Libraries
        • CMake
    • Public API
    • RoadMap
      • [3.7] ~ Spring-Early Summer 2025
      • Nearer term features (Maybe Summer 2025)
      • Further in the future
    • HELICS Type Conversions
      • Available types
        • Invalid Values
      • How types are used in HELICS
        • Interface specification
        • Data publication and extraction
      • Data Representation
      • Data conversions
        • Conversion from Double
        • Conversion from INT
        • Conversion from String
        • Conversion from vector double
        • Conversion from Complex Vector
        • Conversion from Complex
        • Conversion from a Named Point
        • Conversion from Bool
        • Conversion from Time
      • Unit conversions
  • References
    • HELICS Publications
      • Citing HELICS
      • Co-Simulation Architecture and Theory with HELICS
      • HELICS Application papers
    • API Reference
      • C API Reference
        • Table of Contents
        • Enums
      • C++ API Reference (Doxygen)
      • REST Queries API
      • C API
      • Python API
      • matHELICS API
      • Julia API
      • REST Queries API
    • Configuration Options Reference
      • Configuration methods
        • Choosing configuration method
        • How to Use This Reference
      • Sample Configurations
      • General Federate Options
        • name | -n (required)
        • core_type | -t [“zmq”]
        • core_name [HELICS-generated]
        • core_init_string | -i [null]
        • autobroker [false]
        • broker_init_string [null]
        • terminate_on_error [false]
        • source_only | [false]
        • observer [false]
        • reentrant [false]
        • broker_key [null]
      • Logging Options
        • log_file [null]
        • log_level [0]
        • file_log_level [null]
        • console_log_level [null]
        • force_logging_flush [false]
        • dump_log [false]
        • logbuffer [10]
      • Other Options
        • indexgroup [0]
      • Timing Options
        • ignore_time_mismatch [false]
        • uninterruptible [false]
        • period [1ns]
        • offset [0]
        • time_delta [1ns]
        • input_delay [0]
        • output_delay [0]
        • real_time [false]
        • rt_lag and rt_lead`[0.2]
        • rt_tolerance [0.2]
        • wait_for_current_time_update [false]
        • restrictive_time_policy [false]
        • slow_responding [false]
        • event_triggered [false]
      • Iteration
        • forward_compute [false]
        • rollback [false]
        • max_iterations [50]
      • General and Per Subscription, Input, or Publication
        • only_update_on_change and only_transmit_on_change [false]
        • tolerance [0]
        • default [0]
        • connection_required [false]
        • connection_optional [true]
        • default_global [false]
      • Subscription, Input, and/or Publication Options
        • key (required)
        • type [null]
        • unit [null]
        • global [false]
        • buffer_data [false]
        • ignore_units_mismatch [null]
        • info [“”]
        • strict_input_type_checking [false]
      • Publication-only Options
        • targets [null]
      • Input-only Options
        • targets
        • connections [null]
        • input_priority_location [null]
        • clear_priority_list [false]
        • single_connection_only [false]
        • multiple_connections_allowed [true]
        • multi_input_handling_method [none]
      • Endpoint Options
        • name (required)
        • type [null]
        • destination [null]
        • alias [null]
        • subscriptions [null]
        • filters [null]
        • info [“”]
      • Filter Options
        • name [null]
        • source_targets [null]
        • destination_targets [null]
        • info [null]
        • operation [null]
      • Translator Options
        • name [null]
        • type [null]
        • source_targets [null]
        • destination_targets [null]
      • Profiling
        • profiling [false]
        • profiler [null]
        • local_profiling_capture [false]
        • profiling_marker [false]
      • Network
        • interface network
        • reuse_address [false]
        • noack_connect [false]
        • max_size [4096]
        • max_count [256]
        • network_retries [5]
        • encrypted [false]
        • encryption_config
        • use_os_port [false]
        • client or server [null]
        • local_interface [local IP address]
        • broker_address [local IP address]
        • broker_port []
        • broker_name [null]
        • local_port []
        • port_start []
        • force [false]
    • Tools with HELICS Support
      • Power Systems Tools
        • Electric Distribution System Simulation
        • Electric Transmission System Simulation
        • Real time simulators
        • Electric Power Market simulation
        • Contingency Analysis tools
      • Communication Tools
      • Gas Pipeline Modeling
      • Optimization packages
      • Transportation modeling
    • Built-In HELICS Apps
      • Recorder
        • Command line arguments
        • config file detail
      • Player
        • Command line arguments
        • Config File Detail
      • Source
        • Command line arguments
      • helics_app
        • Echo
        • Player
        • Recorder
        • Tracer
        • Source
        • Broker
        • Clone
        • MultiBroker
      • Command Line Arguments
      • Echo
        • Command line arguments
      • Tracer
        • Command line arguments
        • Config File Detail
      • Broker
        • Command line arguments
      • Broker Server
        • Command line arguments
      • Clone
        • Command line arguments
      • Connector
        • Connector configuration
        • Notes on Tags
        • Regular Expression (regex) Matching
        • Interface Creation and Matching
        • Use of the Connector
        • Command line arguments
        • Federate Support
  • Quick links
    • Configuration Options Reference
      • Configuration methods
        • Choosing configuration method
        • How to Use This Reference
      • Sample Configurations
      • General Federate Options
        • name | -n (required)
        • core_type | -t [“zmq”]
        • core_name [HELICS-generated]
        • core_init_string | -i [null]
        • autobroker [false]
        • broker_init_string [null]
        • terminate_on_error [false]
        • source_only | [false]
        • observer [false]
        • reentrant [false]
        • broker_key [null]
      • Logging Options
        • log_file [null]
        • log_level [0]
        • file_log_level [null]
        • console_log_level [null]
        • force_logging_flush [false]
        • dump_log [false]
        • logbuffer [10]
      • Other Options
        • indexgroup [0]
      • Timing Options
        • ignore_time_mismatch [false]
        • uninterruptible [false]
        • period [1ns]
        • offset [0]
        • time_delta [1ns]
        • input_delay [0]
        • output_delay [0]
        • real_time [false]
        • rt_lag and rt_lead`[0.2]
        • rt_tolerance [0.2]
        • wait_for_current_time_update [false]
        • restrictive_time_policy [false]
        • slow_responding [false]
        • event_triggered [false]
      • Iteration
        • forward_compute [false]
        • rollback [false]
        • max_iterations [50]
      • General and Per Subscription, Input, or Publication
        • only_update_on_change and only_transmit_on_change [false]
        • tolerance [0]
        • default [0]
        • connection_required [false]
        • connection_optional [true]
        • default_global [false]
      • Subscription, Input, and/or Publication Options
        • key (required)
        • type [null]
        • unit [null]
        • global [false]
        • buffer_data [false]
        • ignore_units_mismatch [null]
        • info [“”]
        • strict_input_type_checking [false]
      • Publication-only Options
        • targets [null]
      • Input-only Options
        • targets
        • connections [null]
        • input_priority_location [null]
        • clear_priority_list [false]
        • single_connection_only [false]
        • multiple_connections_allowed [true]
        • multi_input_handling_method [none]
      • Endpoint Options
        • name (required)
        • type [null]
        • destination [null]
        • alias [null]
        • subscriptions [null]
        • filters [null]
        • info [“”]
      • Filter Options
        • name [null]
        • source_targets [null]
        • destination_targets [null]
        • info [null]
        • operation [null]
      • Translator Options
        • name [null]
        • type [null]
        • source_targets [null]
        • destination_targets [null]
      • Profiling
        • profiling [false]
        • profiler [null]
        • local_profiling_capture [false]
        • profiling_marker [false]
      • Network
        • interface network
        • reuse_address [false]
        • noack_connect [false]
        • max_size [4096]
        • max_count [256]
        • network_retries [5]
        • encrypted [false]
        • encryption_config
        • use_os_port [false]
        • client or server [null]
        • local_interface [local IP address]
        • broker_address [local IP address]
        • broker_port []
        • broker_name [null]
        • local_port []
        • port_start []
        • force [false]
    • Queries
      • Targets
      • Query String
        • Federate Queries
        • Local Federate Queries
        • Core queries
        • Broker Queries
      • Usage Notes
      • Error Handling
        • Application API
        • C API and interface API’s
      • Timeouts
      • Example
    • Environment variables
      • Federate environment variables
      • Core and Broker environment variables
      • Networking environment variables
      • Environment variables used in the Web server
    • C API Reference
      • Table of Contents
      • Enums
        • HELICS_ITERATION_REQUEST_NO_ITERATION
        • HELICS_ITERATION_REQUEST_FORCE_ITERATION
        • HELICS_ITERATION_REQUEST_ITERATE_IF_NEEDED
        • HELICS_ITERATION_REQUEST_HALT_OPERATIONS
        • HELICS_ITERATION_REQUEST_ERROR
        • HELICS_ITERATION_RESULT_NEXT_STEP
        • HELICS_ITERATION_RESULT_ERROR
        • HELICS_ITERATION_RESULT_HALTED
        • HELICS_ITERATION_RESULT_ITERATING
        • HELICS_STATE_UNKNOWN
        • HELICS_STATE_STARTUP
        • HELICS_STATE_INITIALIZATION
        • HELICS_STATE_EXECUTION
        • HELICS_STATE_FINALIZE
        • HELICS_STATE_ERROR
        • HELICS_STATE_PENDING_INIT
        • HELICS_STATE_PENDING_EXEC
        • HELICS_STATE_PENDING_TIME
        • HELICS_STATE_PENDING_ITERATIVE_TIME
        • HELICS_STATE_PENDING_FINALIZE
        • HELICS_STATE_FINISHED
        • HELICS_CORE_TYPE_DEFAULT
        • HELICS_CORE_TYPE_ZMQ
        • HELICS_CORE_TYPE_MPI
        • HELICS_CORE_TYPE_TEST
        • HELICS_CORE_TYPE_INTERPROCESS
        • HELICS_CORE_TYPE_IPC
        • HELICS_CORE_TYPE_TCP
        • HELICS_CORE_TYPE_UDP
        • HELICS_CORE_TYPE_ZMQ_SS
        • HELICS_CORE_TYPE_NNG
        • HELICS_CORE_TYPE_TCP_SS
        • HELICS_CORE_TYPE_HTTP
        • HELICS_CORE_TYPE_WEBSOCKET
        • HELICS_CORE_TYPE_INPROC
        • HELICS_CORE_TYPE_NULL
        • HELICS_CORE_TYPE_EMPTY
        • HELICS_CORE_TYPE_EXTRACT
        • HELICS_DATA_TYPE_UNKNOWN
        • HELICS_DATA_TYPE_STRING
        • HELICS_DATA_TYPE_DOUBLE
        • HELICS_DATA_TYPE_INT
        • HELICS_DATA_TYPE_COMPLEX
        • HELICS_DATA_TYPE_VECTOR
        • HELICS_DATA_TYPE_COMPLEX_VECTOR
        • HELICS_DATA_TYPE_NAMED_POINT
        • HELICS_DATA_TYPE_BOOLEAN
        • HELICS_DATA_TYPE_TIME
        • HELICS_DATA_TYPE_CHAR
        • HELICS_DATA_TYPE_RAW
        • HELICS_DATA_TYPE_JSON
        • HELICS_DATA_TYPE_MULTI
        • HELICS_DATA_TYPE_ANY
        • HELICS_FLAG_OBSERVER
        • HELICS_FLAG_UNINTERRUPTIBLE
        • HELICS_FLAG_INTERRUPTIBLE
        • HELICS_FLAG_SOURCE_ONLY
        • HELICS_FLAG_ONLY_TRANSMIT_ON_CHANGE
        • HELICS_FLAG_ONLY_UPDATE_ON_CHANGE
        • HELICS_FLAG_WAIT_FOR_CURRENT_TIME_UPDATE
        • HELICS_FLAG_RESTRICTIVE_TIME_POLICY
        • HELICS_FLAG_ROLLBACK
        • HELICS_FLAG_FORWARD_COMPUTE
        • HELICS_FLAG_REALTIME
        • HELICS_FLAG_SINGLE_THREAD_FEDERATE
        • HELICS_FLAG_MULTI_THREAD_CORE
        • HELICS_FLAG_SINGLE_THREAD_CORE
        • HELICS_FLAG_REENTRANT
        • HELICS_FLAG_IGNORE_TIME_MISMATCH_WARNINGS
        • HELICS_FLAG_STRICT_CONFIG_CHECKING
        • HELICS_FLAG_USE_JSON_SERIALIZATION
        • HELICS_FLAG_EVENT_TRIGGERED
        • HELICS_FLAG_LOCAL_PROFILING_CAPTURE
        • HELICS_FLAG_CALLBACK_FEDERATE
        • HELICS_FLAG_AUTOMATED_TIME_REQUEST
        • HELICS_FLAG_DELAY_INIT_ENTRY
        • HELICS_FLAG_ENABLE_INIT_ENTRY
        • HELICS_FLAG_IGNORE
        • HELICS_FLAG_SLOW_RESPONDING
        • HELICS_FLAG_DEBUGGING
        • HELICS_FLAG_TERMINATE_ON_ERROR
        • HELICS_FLAG_FORCE_LOGGING_FLUSH
        • HELICS_FLAG_DUMPLOG
        • HELICS_FLAG_PROFILING
        • HELICS_FLAG_PROFILING_MARKER
        • HELICS_FLAG_ALLOW_REMOTE_CONTROL
        • HELICS_FLAG_DISABLE_REMOTE_CONTROL
        • HELICS_LOG_LEVEL_DUMPLOG
        • HELICS_LOG_LEVEL_NO_PRINT
        • HELICS_LOG_LEVEL_ERROR
        • HELICS_LOG_LEVEL_PROFILING
        • HELICS_LOG_LEVEL_WARNING
        • HELICS_LOG_LEVEL_SUMMARY
        • HELICS_LOG_LEVEL_CONNECTIONS
        • HELICS_LOG_LEVEL_INTERFACES
        • HELICS_LOG_LEVEL_TIMING
        • HELICS_LOG_LEVEL_DATA
        • HELICS_LOG_LEVEL_DEBUG
        • HELICS_LOG_LEVEL_TRACE
        • HELICS_ERROR_FATAL
        • HELICS_ERROR_EXTERNAL_TYPE
        • HELICS_ERROR_OTHER
        • HELICS_USER_EXCEPTION
        • HELICS_ERROR_INSUFFICIENT_SPACE
        • HELICS_ERROR_EXECUTION_FAILURE
        • HELICS_ERROR_INVALID_FUNCTION_CALL
        • HELICS_ERROR_INVALID_STATE_TRANSITION
        • HELICS_ERROR_SYSTEM_FAILURE
        • HELICS_ERROR_DISCARD
        • HELICS_ERROR_INVALID_ARGUMENT
        • HELICS_ERROR_INVALID_OBJECT
        • HELICS_ERROR_CONNECTION_FAILURE
        • HELICS_ERROR_REGISTRATION_FAILURE
        • HELICS_ERROR_USER_ABORT
        • HELICS_ERROR_TERMINATED
        • HELICS_PROPERTY_TIME_DELTA
        • HELICS_PROPERTY_TIME_PERIOD
        • HELICS_PROPERTY_TIME_OFFSET
        • HELICS_PROPERTY_TIME_RT_LAG
        • HELICS_PROPERTY_TIME_RT_LEAD
        • HELICS_PROPERTY_TIME_RT_TOLERANCE
        • HELICS_PROPERTY_TIME_INPUT_DELAY
        • HELICS_PROPERTY_TIME_OUTPUT_DELAY
        • HELICS_PROPERTY_TIME_STOPTIME
        • HELICS_PROPERTY_TIME_GRANT_TIMEOUT
        • HELICS_PROPERTY_INT_CURRENT_ITERATION
        • HELICS_PROPERTY_INT_MAX_ITERATIONS
        • HELICS_PROPERTY_INT_LOG_LEVEL
        • HELICS_PROPERTY_INT_FILE_LOG_LEVEL
        • HELICS_PROPERTY_INT_CONSOLE_LOG_LEVEL
        • HELICS_PROPERTY_INT_LOG_BUFFER
        • HELICS_PROPERTY_INT_INDEX_GROUP
        • HELICS_MULTI_INPUT_NO_OP
        • HELICS_MULTI_INPUT_VECTORIZE_OPERATION
        • HELICS_MULTI_INPUT_AND_OPERATION
        • HELICS_MULTI_INPUT_OR_OPERATION
        • HELICS_MULTI_INPUT_SUM_OPERATION
        • HELICS_MULTI_INPUT_DIFF_OPERATION
        • HELICS_MULTI_INPUT_MAX_OPERATION
        • HELICS_MULTI_INPUT_MIN_OPERATION
        • HELICS_MULTI_INPUT_AVERAGE_OPERATION
        • HELICS_HANDLE_OPTION_CONNECTION_REQUIRED
        • HELICS_HANDLE_OPTION_CONNECTION_OPTIONAL
        • HELICS_HANDLE_OPTION_SINGLE_CONNECTION_ONLY
        • HELICS_HANDLE_OPTION_MULTIPLE_CONNECTIONS_ALLOWED
        • HELICS_HANDLE_OPTION_BUFFER_DATA
        • HELICS_HANDLE_OPTION_RECONNECTABLE
        • HELICS_HANDLE_OPTION_STRICT_TYPE_CHECKING
        • HELICS_HANDLE_OPTION_RECEIVE_ONLY
        • HELICS_HANDLE_OPTION_SOURCE_ONLY
        • HELICS_HANDLE_OPTION_IGNORE_UNIT_MISMATCH
        • HELICS_HANDLE_OPTION_ONLY_TRANSMIT_ON_CHANGE
        • HELICS_HANDLE_OPTION_ONLY_UPDATE_ON_CHANGE
        • HELICS_HANDLE_OPTION_IGNORE_INTERRUPTS
        • HELICS_HANDLE_OPTION_MULTI_INPUT_HANDLING_METHOD
        • HELICS_HANDLE_OPTION_INPUT_PRIORITY_LOCATION
        • HELICS_HANDLE_OPTION_CLEAR_PRIORITY_LIST
        • HELICS_HANDLE_OPTION_CONNECTIONS
        • HELICS_HANDLE_OPTION_TIME_RESTRICTED
        • HELICS_FILTER_TYPE_CUSTOM
        • HELICS_FILTER_TYPE_DELAY
        • HELICS_FILTER_TYPE_RANDOM_DELAY
        • HELICS_FILTER_TYPE_RANDOM_DROP
        • HELICS_FILTER_TYPE_REROUTE
        • HELICS_FILTER_TYPE_CLONE
        • HELICS_FILTER_TYPE_FIREWALL
        • HELICS_TRANSLATOR_TYPE_CUSTOM
        • HELICS_TRANSLATOR_TYPE_JSON
        • HELICS_TRANSLATOR_TYPE_BINARY
        • HELICS_SEQUENCING_MODE_FAST
        • HELICS_SEQUENCING_MODE_ORDERED
        • HELICS_SEQUENCING_MODE_DEFAULT
        • General
        • Creation
        • Broker
        • Core
        • App
        • FederateInfo
        • Federate
        • ValueFederate
        • Publication
        • Input
        • MessageFederate
        • Endpoint
        • Message
        • Data
        • FilterFederate
        • Filter
        • Translator
        • Query
    • HELICS CMake options
      • Main Options
      • Advanced Options
        • HELICS Configuration options
        • Build configuration Options
      • Hidden Options
    • Built-In HELICS Apps
      • Recorder
        • Command line arguments
        • config file detail
      • Player
        • Command line arguments
        • Config File Detail
      • Source
        • Command line arguments
      • helics_app
        • Echo
        • Player
        • Recorder
        • Tracer
        • Source
        • Broker
        • Clone
        • MultiBroker
      • Command Line Arguments
      • Echo
        • Command line arguments
      • Tracer
        • Command line arguments
        • Config File Detail
      • Broker
        • Command line arguments
      • Broker Server
        • Command line arguments
      • Clone
        • Command line arguments
      • Connector
        • Connector configuration
        • Notes on Tags
        • Regular Expression (regex) Matching
        • Interface Creation and Matching
        • Use of the Connector
        • Command line arguments
        • Federate Support
HELICS
  • Developer Guide
  • View page source

Developer Guide

  • Style Guide
  • Generating SWIG extension
  • Run tests
  • Generating Documentation
  • HELICS Benchmarks
  • Description of the different continuous integration test setups running on the CI servers
  • (Planned) CI/CD Infrastructure
  • Porting Guide: HELICS 2 to 3
  • Public API
  • RoadMap
  • HELICS Type Conversions
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© Copyright 2017-2026 Battelle Memorial Institute; Lawrence Livermore National Security, LLC; Alliance for Energy Innovation LLC. See the top-level NOTICE for additional details. All rights reserved. SPDX-License-Identifier: BSD-3-Clause. Documentation source in https://github.com/GMLC-TDC/HELICS. Last updated on Jul 11, 2026.

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