Version 2.5.0

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Summary

This release note also covers changes released in updates 2.4.0.1-2.4.0.9
Version 2.5 contains serveral improvements and bug fixes
For PlanWise, the support for CPLEX optimization solver has been changed, see instructions in the Readme.txt file here: http://heureka2-1.slu.se/Filerepository/SolverLinks/Cplex/

New features

Help documentation on result variables and concepts

As you may know, the Heureka Wiki is used as a complement to the actual help document to give more in-depth documentation, for example about models, and to serve as a reference dictionary to certain terms and concepts. New pages are currently being added to give a concentrated overview of Result Variables and control table settings. A dictionary has also been added, which for example includes an explanation on how net present value is calculated. Note that most of the variable explanations are more or less identical to those displayed as tool tips in the applications, but put in one place to give a better overview.
Check out the result variables documentation so far: Result Variables
...and the dictionary: Dictionary

Default regeneration species not only pine or spruce in PlanWise

When selecting regeneration species in the Regeneration Settings form in PlanWise, you have had the options to either select the site index species as converted to in Heureka (i.e. pine or spruce), or enter a specific species. This means that you have had to create a specific forest domain and a specific control category for each species group that you wanted to regenerate. As a new option, which is default, "Regeneration Species is available. This functionality is very similar to how you choose what species to retain in cleanings and thinnings. Choosing Regeneration Species means that the same species will be used as in the previous rotation. The regeneration species for the first rotation is determined automatically (see Main Species in the help documentation http://www.heurekaslu.org/help/en/index.html?huvudtradslag.htm).

Other changes

Marklund's biomass functions now default in new projects

Marklund's biomass functions are now the default biomass function when you create a new project. Marklund's function have been found to give more logical results since they include tree height. Information on what functions have been implemented can be found here: http://heurekaslu.org/wiki/Biomass_functions

Help function for installing SQL Server Express has been removed

Heureka's applications have had a built-in help function to simplify the installation of SQL Server Express. However, this function has worked poorly due to some unresolved access right, so the help function has been dropped. Instructions on how to install SQL Server Express manually is still available in the help documentation.

CPLEX solver support modified

Due to a somewhat unclear rights for distributing certain files owned by IBM CPLEX, the buult-in for CPLEX has been removed and replaced with a plugin. If you used CPLEX, there a a couple files you must place in a certain directory to make it work, instructions can be found here: http://heureka2-1.slu.se/Filerepository/SolverLinks/Cplex/

Bug fix: Third rotation not correct

In the treatment program generator (TPG), Heureka is often simulating three rotations. The third rotation has been too simplified, with a faulty timing of thinnings. Since the discounted value of that rotation is typically very small, the error should not have affected solution to any considerable extent, but the reported soil expectation values have not been correct. Read more about how soil expectation is calculated here: Heureka Dictionary: Soil expection value

Bug fix: Biomass in cut trees in precommercial thinning was not calculated

Result variables "Biomass in Cut Trees" in result group Treatment represent the amunt of biomass in cut trees, whether extacted from the forest or left as residues. For cleaning, this step was skipped but has no been fixed.