CHANGELOG

## Changelog

## [6.0.0] - 09-12-2025

### Added
- **New EQSS1, EQSS2 and EQSS3** `LIQSS` based methods.
- **New CHEQSS1, CHEQSS2 and CHEQSS3** `LIQSS` based methods.
- **New Python mehtod to update model parameters**.

### Removed
- **CQSS** is deprecated.

## [5.0.0] - 04-08-2025

### Added
- **New CQSS1, CQSS2 and CQSS3** development `QSS` methods that can be edited witout having to recompile the simulation engine.
- **New Python plot script** not the default option, to enable it add `plot_data.py` as the plot command in the GUI settings.
- **New Python environment** for the GUI that loads all the required packages.
- **CMake build system** instead of plain make files. 

### Changed
- Changed default install path.
- Updated/Improved all binary scripts.

## [4.5.3] - 29-01-2025

### Fixed
- Modified build script to include `Python QSS` module.

### Changed
- Remove local `Scotch` library and use system library instead.

## [4.5.2] - 15-01-2025

### Fixed
- Fixed overflow in `Integer` and `Real` definitions in SBG lib that causes assertion failures in the compiler.

## [4.5.1] - 14-01-2025

### Fixed
- Python module model config methods now use Python 3 libconf to access and update the files.

## [4.5.0] - 03-01-2025

### Added
- **New Python module** with basic access to the solver, that allows running models, access logs, etc.
- **New GUI Python console widget** that loads `qss_solver` module to execute and access simulation logs.
- **New GUI bash widget**.
- Added a new model option `partitionOnly` to generate partition logs and info without running the model.

### Changed
- Fixed model function includes in generated C code.
- Window geometry changes are now saved.

## [4.4.0] - 28-08-2024

### Added
- **Allow discrete Integer** definitions to be able to use them as array indexes.
- **New MMO_CVODEMaxOder annotation** to select the max order used in `CVODE` solver.
- **New MMO_XOutput annotation** that allows selecting state variable output (exerimental).

### Changed
- Use time variable in initial code.
- Fixed QSS first order method recompute next time.

## [4.3.0] - 21-09-2022

### Added
- **mLIQSS and mLIQSS2** methods are now supported.

### Changed
- Fixed input events code generation for non-autonomous equations. 

### Removed
- **mLIQSS3** is deprecated.

## [4.2.1] - 28-06-2023

### Added
- Added mLIQSS article models to distribution.

### Changed
- Fix mLIQSS recompute next time to only update the Jacobian approximation when the influencer is a state variable.

## [4.2.0] - 01-06-2023

### Added
- Allow quoted Q-IDENT variable definition in MicroModelica.
- Adapt reinit statements and for definition in algorithm sections to new Modelica specification.
- Added code generation for pure algebraic recursive dependencies.
- Added mLIQSS methods as experimental, they can be anebled from extended settings on the GUI.
- Reinit state assignments are now computed using the current state value instead of the quantized value.

### Changed
- Fix terminate command code generation.

## [4.0.1] - 03-11-2022

### Added
- Compilation **Ubuntu 22.04** is now supported.
- Use State variables values instead of quantized approximation in handler reinit statements for QSS methods.

### Changed
- The QSS methods event structure **SD_EventData** now contains a new matrix that defines the RHS state variables not used in LHS state assignments. 

### Removed
- Gtest lib compilation, the compiled libraries are distributed now.

## [4.0.0] - 30-09-2022

### Added
- **N-Dimensional** Arrays are supported.
- New algorithms were developed to compute all dependency matrices that use the [**SB--Graph**](https://github.com/CIFASIS/sb-graph) interface.
- Allow discrete variable update in the form: (a,b,c) = f(d,f,g) in event handlers.
- New **MMO_RandomSeed** annotation that sets the seed used in all functions from the `math` package.
- Allow user defined dependency matrix entries.
- Allow dense matrix generation in **LIQSS_BDF** hybrid method (useful for testing).

### Changed
- All variables defined in the model instance generated by the MicroModelica C Compiler are now described in terms of macro definitions. 

### Removed
- Support for Mac and Windows.
- Support for rpm packages.
- 3rd party Scotch and Ginac libraries, system installed libraries are used now.

## [3.2] 

### Added
- Implemented parallel simulation strategy
- Implemented new mixed mode QSS-BDF algorithm.