Frequently Asked Questions

Table of Contents

1  General Questions
      1.1  What does "Fesslix" mean?
      1.2  How is "Fesslix" pronounced?
      1.3  When was Fesslix started?
2  Installation and Compilation
      2.1  Windows
      2.2  Linux
3  Running Fesslix
      3.1  Does Fesslix have a GUI?
      3.2  How to execute the program?
4  Working with Fesslix
      4.1  How to change the precision of the output?

1 General Questions

1.1 What does "Fesslix" mean?

The name Fesslix stands for the intended original purpose of the software: Finite Element Static Software for Linux. Nowadays, the objective of the software has changed to stochastic analysis, but the name remains the same.

1.2 How is "Fesslix" pronounced?

F like the F in force
e like the e in yes
ss like the s in source
l like the l in love
ix like the icks in tricks

1.3 When was Fesslix started?

The first lines of the source code of Fesslix where written on Easter Sunday, 2008.

2 Installation and Compilation

2.1 Windows

Error: python27.dll is missing

If you get the error message: "The program can't start because python27.dll is missing from your computer. Try reinstalling the program to fix this problem."

Please make sure that you have a 64-bit version of Python 2.7 installed on your system. You can download the latest 2.7 release from here: https://www.python.org/downloads/windows/.

Error: libeng.dll is missing

If you get the error message: "The program can't start because libeng.dll is missing from your computer. Try reinstalling the program to fix this problem."

This error is probably due to (i) not having Matlab installed on your system, or (ii) not having a 64-bit version of Matlab installed on your system.

2.2 Linux

Can I run make in parallel? (Linux)

Yes, just execute (for example) ...

Terminal

make -j2

... to allow make to create two processes.

3 Running Fesslix

3.1 Does Fesslix have a GUI?

No, Fesslix does not have a GUI (Graphical User Iterface). Fesslix is operated from the command line.

3.2 How to execute the program?

Usually, you have a Fesslix-parameter-file that you would like to execute.

If you work in Linux, the simplest way to start Fesslix is:

Terminal

fesslix PARAFILE

where PARAFILE is a placeholder for the Fesslix-parameter-file to execute.

If you work with Windows, the easiest way to start Fesslix is to right-click on the parameter file (file-type .flx) you would like to parse and select Execute with Fesslix from the appearing context menu.

4 Working with Fesslix

4.1 How to change the precision of the output?

The precision of the numerical output of Fesslix can be changed using the statement default and the DefSetNames flxoutput::float::XYZ. The default settings can also be modified using the options in the group fpc in the configuration file of Fesslix. For a more detailed description, please consult the Fesslix User's Guide.