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Appendix
Reference information is provided in the appendix.
Solution Control
Control the execution of Feko by specifying the memory management and environment variables.
Feko Environment Overview
The Feko environment is setup using the Lua scripting language and internal functions. The environment setup is uniform across the different platforms.
Environment Settings Overview
The Feko environment is set up internally by means of Lua applications and internal functions

Welcome
Release Notes
See what's new in the latest release.
Get Started
The Feko Getting Started Guide contains step-by-step instructions on how to get started with Feko.
Examples
The Feko Example Guide contains a collection of examples that teaches you Feko concepts and essentials.
Introduction to Feko
Feko is a comprehensive electromagnetic solver with multiple solution methods that is used for electromagnetic field analyses involving 3D objects of arbitrary shapes.
CADFEKO
CADFEKO is used to create and mesh the geometry or model mesh, specify the solution settings and calculation requests in a graphical environment.
POSTFEKO
POSTFEKO, the Feko post processor, is used to display the model (configuration and mesh), results on graphs and 3D views.
EDITFEKO
EDITFEKO is used to construct advanced models (both the geometry and solution requirements) using a high-level scripting language which includes loops and conditional statements.
Feko Solution Methods
One of the key features in Feko is that it includes a broad set of unique and hybridised solution methods. Effective use of Feko features requires an understanding of the available methods.
Optimisation in Feko
Feko offers state-of-the-art optimisation engines based on generic algorithm (GA) and other methods, which can be used to automatically optimise the design and determine the optimum solution.
Feko Utilities
The Feko utilities consist of PREFEKO, OPTFEKO, ADAPTFEKO, the Launcher utility, Updater and the crash reporter.
Description of the Output File of Feko
Feko writes all the results to an ASCII output file .out as well as a binary output file .bof for usage by POSTFEKO. Use the .out file to obtain additional information about the solution.
Feko Application Macros
A large collection of application macros are available for CADFEKO and POSTFEKO.
Scripts and Application Programming Interface (API)
CADFEKO and POSTFEKO have a powerful, fast, lightweight scripting language integrated into the application allowing you to create models, get hold of simulation results and model configuration information as well as manipulation of data and automate repetitive tasks.
Appendix
Reference information is provided in the appendix.
- Application Programming Interface (API)
  CADFEKO and POSTFEKO have a powerful, fast, lightweight scripting language integrated into the application that allows you to create models, get hold of simulation results and model configuration information and much more.
- EDITFEKO Cards
  Each geometry and calculation request are entered on a separate line in the .pre and are referred to as cards.
- How-Tos
  A collection of how-tos are included that covers advanced concepts.
- FAQ
  A collection of frequently asked questions (FAQ) relating to advanced concepts are included.
- Troubleshooting
  Common problems that you may encounter are discussed as well as their solutions.
- Meshing
  When meshing a model, you can either use the automatic meshing algorithm to calculate the appropriate mesh settings or you can specify the mesh sizes. When you specify the mesh sizes, the mesh sizes should adhere to certain guidelines.
- SAR Standards
  Feko makes use of a local peak SAR algorithm.
- Solution Control
  Control the execution of Feko by specifying the memory management and environment variables.
  - Dynamic Memory Management
    Use advanced settings and variables for memory management in Feko.
  - Feko Environment Overview
    The Feko environment is setup using the Lua scripting language and internal functions. The environment setup is uniform across the different platforms.
    - Environment Settings Overview
      The Feko environment is set up internally by means of Lua applications and internal functions
    - Functions for Environment-Related Tasks
    - List of Environment Variables
      Control the execution of Feko with environment variables.
- Read MAT, LUD, RHS and STR Files
  The .mat file, .lud file and .rhs file are not generated by default, but can be read externally.
- Integration With Other Tools
  Feko integrates with various products within Altair HyperWorks Products such as HyperStudy. Integration with third-party products is also supported through the powerful scripting and plug-in infrastructure.
- SPICE3f5
  Use the correct structure, convention and syntax for a SPICE circuit definition in Feko.
- List of Acronyms and Abbreviations
  View the list of commonly used acronyms in Feko.
- Summary of Files
  Feko creates and uses many different file types. It is useful to know what is stored in the various files and weather they were created by Feko and if it is safe to delete them. The files are grouped as either native files that have been created by Feko or non-native files that are supported by Feko. Non-native files are often exported by Feko even if the formats are not under the control of the Feko development team.
- Common Errors and Warnings
  A Feko Errors, Warnings and Notes Reference Guide is available as a reference for messages that may be encountered in Feko.

Environment Settings Overview

The Feko environment is set up internally by means of Lua applications and internal functions

Each application is self-aware. It will detect and set up the environment based on its location. The default environment for the current installation will be loaded from a set of mandatory files. Any user-specific environment variables can then be added/changed in optional files loaded after the mandatory files. It allows for the user-specific environment variables to overwrite the global environment variables, rather than editing the file containing the global default environment variables

The Lua scripts are loaded in the following order:

FEKO_HOME/FEKOenvironmentFromSetup.lua

This mandatory file is created at installation time. It contains the global default settings for the current installation. It is not advised to edit this file, unless a different setting is required than specified during installation.
FEKO_HOME/FEKOenvironment.lua

This mandatory file is provided and managed by Feko to ensure correct functionality. This file may be updated by the update utility, so any changes to it may be lost.
FEKO_USER_HOME/FEKOenvironment.lua

This is an optional file. It must be created by the user if and when required.
Windows:

%HOMEDRIVE%%HOMEPATH%\FEKOenvironment.lua

It must be created by the user if and when required. If it is not found, it will be silently ignored and operation continues.

%HOMEDRIVE%%HOMEPATH%\FEKOenvironment.lua

It must be created by the user if and when required. If it is not found, it will be silently ignored and operation continues.

%USERPROFILE%\FEKOenvironment.lua

It must be created by the user if and when required. If it is not found, it will be silently ignored and operation continues.

Linux:

$HOME/FEKOenvironment.lua

It must be created by the user if and when required. If it is not found, it will be silently ignored and operation continues.
FEKO_USER_ENV_INIFILE

It must be created by the user if and when required. If it is not found, it will be silently ignored and operation continues.