Difference between revisions of "Known Issues"

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(Created page with '==Known problems== ====Common==== *Mean age will be underestimated for young stand plantations with a mean height less than 1 m. The system will consider these stands as bare lan�?�')
 
 
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[[Category:Release]]
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Updated 2017-11-07
 
==Known problems==
 
==Known problems==
====Common====
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*Mean age will be underestimated for young stand plantations with a mean height less than 1 m. The system will consider these stands as bare land and regenerate them, despite they may already be established. The problem occurs when you have entered data with the [[Import of stand register/sv|Import Stand Register]] utility, and not entered regeneration method and year for the young stands. The problem is solved if you enter a plantation year and method for all stands that are have a mean height less than 1 m.
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*Generating reports with large dataset and several columns can lead to "Time out expired" from the connected SQL Server. If so, try one of the following:
*Result variables of type boolean and enum are not displayed (in Treatment Data and Financial Data).
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**Try to set "Query Wait" in SQl Server Management Studio (for the database server) to a larger value (http://msdn.microsoft.com/en-us/library/ms189539(v=sql.105).aspx).  
*The handling of existing seed trees and overstorey trees are not completed, the only alternatives are "Removed Immediately" and "Leave". Other options, such as "Leave for x years", and "Apply treatment propsosal" should be implemented. In some cases, trees are mistakenly classified as overstorey trees and removed. There is on example of this on a multi-layered oldgrowth spruce forest (urskogsyta Hällberget).
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**A workaround is to export data from Optimization Results > Details, and use pivot tables in Excel. Also avoid selecting more than one simulation or plan at a time when creating reports.
*The calculation of soil expectation value is faulty when seed trees or shelterwood trees are retained into the subsequent forest generation.
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**Another work-around is to use SQL Server Profiler (not available in Express version) to get the SQL Query and run the query in SQL Server Management Studio.
*The timing of regeneration (planting and sowing) has an error in RegWise and PlanWise, it is applied five years too late.
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*When a stand leaves the young stand phase and transfers into established phase, there are is often a "glitch" in annual volume increment. Also, trees with a diameter less than 4 cm are not transferred, because ingrowth functions predicts the ingrowth of trees with into the 4-cm class. This may give inconsistent results when studying young stand management.
====RegWise====
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*There is no harvesting in the first period.
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*It is possible that dead wood "stays to long" in the final decay class.  
*Target harvest levels are not met.
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*The simulation of tree lists from stand data currently only handles even-aged stands, with bell-shaped diameter distributions. Distribution parameters for inverse J-shaped distributions (as tyoical for uneven-aged stands) are currently not available.
====PlanWise====
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*The Tactical Treatment Program Generator is calculating erroneuous net present values.
 
 
 
 
 
 
 
 
 
 
==Features to be implemented==
 
==Features to be implemented==
*Add functionality to the Report Builder in PlanWise and RegWise to make class diagrams ("with group by-clause").  
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<!--*Add functionality to the Report Builder in PlanWise and RegWise to make class diagrams ("with group by-clause"). -->
*Wood property models (in progress)
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<!--*Wood property models (in progress).-->
*More detailed results for extracted forest fuel (distribution over tree parts).
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<!--*More detailed results for extracted forest fuel (distribution over tree fractions).-->
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*Add columns for diameter distribution model parameters, so that users who have these data can enter them in the [[Import of stand register|stand register spreadsheet]].

Latest revision as of 11:15, 7 November 2017

Updated 2017-11-07

Known problems

  • It is possible that dead wood "stays to long" in the final decay class.

Features to be implemented

  • Add columns for diameter distribution model parameters, so that users who have these data can enter them in the stand register spreadsheet.