Search found 31 matches

by Tuomas Miettinen
September 1st, 2014, 8:41 am
Forum: Simantics System Dynamics
Topic: Nonlinear Equation Solver
Replies: 13
Views: 155334

Re: Nonlinear Equation Solver

Hi, There's currently no straightforward way of including a Modelica library to Simantics System Dynamics. I think there are two alternatives you can do with that library (or any other Modelica library): 1) You can add the functions in that library by hand to the tool. This basically means that you'...
by Tuomas Miettinen
August 26th, 2014, 2:15 pm
Forum: Simantics System Dynamics
Topic: Modelica and Vensim Functions generated NullPointerExeption
Replies: 2
Views: 31889

Re: Modelica and Vensim Functions generated NullPointerExept

This is due to the custom "internal" Modelica solver being set as the default solver, instead of OpenModelica. The internal solver is faster but is missing a lot of features supported by OpenModelica. Switching to OpenModelica solves this issue. The solver can be changed in Window -> Preferences -> ...
by Tuomas Miettinen
April 15th, 2014, 7:54 am
Forum: Simantics System Dynamics
Topic: Some issues in simulation
Replies: 6
Views: 46904

Re: Some issues in simulation

Hi,

If the simulation diverges, you'll get NaN. You can also try to change the solver in Model Properties - Method (Euler, Runge-Kutta, etc.).

Tuomas
by Tuomas Miettinen
April 7th, 2014, 1:37 pm
Forum: Simantics System Dynamics
Topic: Some questions on saving the model file and user interface.
Replies: 2
Views: 6290

Re: Some questions on saving the model file and user interfa

Hi Nikhil, Prob.1: Are you sure you saved (=exported) the model instead of saving the simulation results? A model is exported by right-clicking the model in the model browser and selecting Export -> Model. The Disk icon on the toolbar saves simulation results instead. Prob.2: Operating interfaces ar...
by Tuomas Miettinen
February 13th, 2014, 9:29 am
Forum: Simantics System Dynamics Development
Topic: Scrollbar
Replies: 1
Views: 26672

Re: Scrollbar

Hi Dhani,

There's currently no scrollbar feature, however the model can be scrolled sideways by holding Mouse3 down and dragging the model or its background.

Tuomas
by Tuomas Miettinen
February 3rd, 2014, 1:47 pm
Forum: Simantics System Dynamics
Topic: Problem in Trends
Replies: 1
Views: 12996

Re: Problem in Trends

Hi Imran, In your model you have created the predator prey structure inside a Module (ModuleType), instead of the Configuration. The module must be instantiated to be able to simulate it. Attached the model with the ModuleType instantiated. The inside of the module can be viewed by right clicking th...