Source code

The latest source code can be obtained from the GitHub - LIISim3 repository.

Please see the developer’s guide (Downloads) for further instructions on compiling the source code and required libraries.


Changes and bugfixes for the current LIISim version will be shown on this page after release of the software. If you want to get notifications about updates, please write an email to

Version 3.0.7 (2019-01.04)

  • DatabaseEditor: Properties can now be directly edited within the GUI and all supported property types can be selected from a dropdown menu
  • AnalysisTools - MeasurementList: new analysis tool for visualization of all loaded MRuns and parameters in a table, supports copy/paste functionalities to clipboard
  • AnalysisTools - TemperatureFit: customized Planck curves can be added for comparison to the ‘Fit visualization’ plot

  • AnalysisTools - TemperatureFit: added plot tools and auto-scaling to ‘Fit visualization’ plot
  • AnalysisTools - TemperatureFit: added plot tools for ‘Result’ plot
  • AnalysisTools - ParameterAnalysis: new parameter types ‘min/max of range’ and ‘time at min/max signal value’
  • AnalysisTools - ParameterAnalysis: plot type of ‘Parameter Visualization’ plot can now be changed by right click menu
  • Export: IOCSV: temperature traces can now be exported, export options added
Bug fixes
  • Code fixes for support of MSVC2017 compiler
  • AnalysisTools - TemperatureFit: fixed iteration counter in spectrum plot
  • AnalysisTools - TemperatureFit: auto scaling modified to prevent the plot to clip into the legend
  • AnalysisTools - ParameterAnalysis: shows now ND-transmission for each channel instead of filter identifier
  • DataTableWidget: x-values are now shown in their correct unit (previously only time unit)
  • Export: IOMatlab: handling for default ND-filter added (vector in MATLAB files could be empty)
  • Export: IOCSV: removed false error message about ‘dt’
  • Import: ImportDialog: now shows name of LIISettings filename in error message if file was not found
  • IOCustom/ImportDialogHelper: fixed import window not closing after successful signal import
  • NotificationWindow: fixed auto scrolling bug when new log messages are appended
  • MRunSettings: fix for “settings not found” problem occured in some cases
Other changes
  • IOMatlab, SignalManager, ExportOverwriteDialog: dialog window is opened if export filename already exists (overwrite or choose another name)
  • DatabaseEditor: reminder for ‘unsaved changes’ added
  • DatabaseEditor: reworked error handling
  • DatabaseEditor: added generation of unique filenames, dialog is now instanciated with db type to check for name duplicates
  • DatabaseEditor, MasterWindow: dialog window opens at exit if database editor contains unsaved changes
  • MRunDetails: settings changes are now color-marked, warning at exit added if settings are not saved
  • Signal: added functions to calculate min and max value of signal range
  • Signal: added functions to calculate time at max/min value
  • AnalysisTools - TemperatureFit: moved ‘clear plot’ button from ‘Fit’ plot toolbar to planck curve settings

Version 3.0.6 (2018-04-03)

  • Qt framework updated to 5.10.1
  • Matio Library updated to 1.5.11
  • zlib version 1.2.11 added for MATLAB file compression support
  • Export: MATLAB export reworked, new structure with support of parallel export for unprocessed and processed data, standard deviation, temperature calculator metadata, file compression
  • Plugin:Transfer: new plugin for transfering processed signals from raw to absolute processing chain
Bug fixes
  • Fixed scaling problems with high DPI displays (
  • Plugin:Baseline: offset from LIISettings was only applied for first channel
  • Plugin:MultiSignalAverage: when plugin is added, ‘end signal’-field is now set to the highest signal number
  • FitCreator: FitRun is removed when associated MRun is removed
  • AnalysisTools - TemperatureFit: fixed crash when selecting a datapoint without a valid temperature signal calculated
  • AnalysisTools - TemperatureFit: when ‘clear plot’ button of FitVisualization plot was pressed, additional legend items in FitResults are added
  • AnalysisTools - TemperatureFit: for Fit Results plot, ‘Show’ combobox items were swapped
  • AnalysisTools - ParameterAnalysis: multi-signal average signals are only shown once for temperature traces
  • SignalPlot: channel description in plot legend showed ‘ch’ for temperature signals
  • SignalPlot: standard deviation envelope was displayed even if channel was deactivated
  • SignalPlot: channel selection is now preserved while the checkboxes are displayed and other MRuns are selected
  • SignalPlot: channel checkboxes label changed to ‘T#’ when signal type is temperature.
Other changes
  • ExportDialog: selected export type is now saved/restored across restarts
  • FitSettings: revamped due to scaling issues on high DPI displays
  • GeneralSettings: default session file name unified to ‘iniSession.xml’
  • GeneralSettings: button added to reset splitter states
  • GuiSettings: added functions to load/save/reset splitter states
  • SignalPlot: Channel checkbox bahavior improved: channel checkboxes state is preserved if other MRun is selected and if checkboxes are hidden, all channels are shown again.
  • MRunDetails: table layout improved
  • SignalManager: changed some status messages, so they are constantly displayed during signal processing
  • AnalysisTools - ParameterAnalysis: changed data table resize method, resizing is now possible after table update

LIISim - Model Development Kit (MDK)


Additionally to the C++ software, a model development kit (MDK) was written in MATLAB for comparison and validation of the integrity of the implemented algorithms. For the MDK the same class structure is used and the functionalities are limited to simulation of temperature traces using the same heat-transfer models and databases as of the C++ version. The MDK can be used for testing and developing new models before they are integrated in the LIISim framework.


LIISim is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

LIISim is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.