Hi, Yep, that's of course possible. A big word of warning though, the procedure of setting up the development environment for Sysdyn and to get it to compile has quite a few steps and is difficult. But if you have spare time and want to try out, first you need to request access to Simantics git repo...

Hi,

I took a look at this and didn't find any way to do it

BR,
Tuomas

Your model configuration is such that the initial condition cannot be solved. As an example, if you create two Auxiliaries: a=b and b=a+1, you cannot solve initial condition since there are no a and b for which the equations hold at time=0. I don't know exactly what kind of a situation causes the ve...

I'm still unable to access the screenshot.

There seems to be no attachment, maybe the forum has blocked it for some reason.

Hmm, there seems to have been some problem with the forum as my response didn't go through, so let's try again: 1. You can copy the values by selecting the time series e.g. with Ctrl+A and then copying it to clipboard with Ctrl+C. I think that's the way that is meant in the wiki by the CSV format. 2...

I'm afraid our development has been targeted toward other features lately, so there is most likely no fix for this problem.

Hmm, it's known that diagram operations are quite slow but I can't recall having that bad performance, with 150 elements at least. Maybe if your model forms a structure of deep hierarchical modules, that is, for instance if you have ten modules on the top layer and they all have ten modules within a...

We still do some development to the Sysdyn, but mainly our development focuses on the Simupedia tool, which we utilize to create end user interfaces to Sysdyn. Sysdyn has quite a lot in common with Vensim, but of cource there are a lot of differences. For instance, for a solver we support OpenModeli...

You can get the initial value with the delay function. E.g., Aux1 = time + 1 Aux2 = delay(Aux1, stopTime) gives Aux2 = 1 thru the whole simulation. Can't tell how to do that in the middle of the simulation, but since the Sysdyn model is compiled to a Modelica model, there might be some Modelica func...

The documentation was imperfect: to use C or C++ you need to use OpenModelica as the solver. So if you haven't already downloaded the Sysdyn version with OpenModelica included, you first need to do so. Then, you need to set the OpenModelica as the solver in the Preferences (Window -> Preferences -> ...

Currently all that kind of unit validation problems can be cleared with one function: unitCast(). Using this function in the equation allows you to change the unit of any expression within that equation to a wildcard. Of course you can't check the validity of that unit, but at least you can get rid ...

Have you accidentally clicked the "Create Dependency" toggle button in the toolbar (the blue arrow, the fifth one from left)? At least seems to replicate your behavior.

Hi,

Sounds quite strange, maybe there was a failure in the connection between the user interface and the underlying database...? If so, starting from an empty workspace should fix the issue. I'm assuming you're using 1.9.0.

Tuomas

Hi,

There seems not to be a model attached.

The mod function is now working in the internal solver as well. It's available in the next nightly build (http://www.simantics.org/download/sysdyn/nightly/trunk/).

Hi, There's nothing wrong with your model, it's a bug in the tool. While waiting for a solution, you can simulate the model by using the OpenModelica solver, the solver can be switched in Window -> Preferences -> Solver. You need to have the version of the tool installed which has OpenModelica inclu...

Hi,

Currently not. In addition to models made in Sysdyn, import from Vensim and XMILE formats are supported, to some extent.

The only way that I know of how to use randomness is with sensitivity analysis experiments. We tried to implement a random variable as such a couple of years ago but didn't succeed too well. I think it was due to Modelica not supporting random numbers.

BR,
Tuomas

Yup, the Internal solver in under development and thus lacking some Modelica features. In the upcoming release the Internal solver will be improved a lot and it will be better than OpenModelica in many applications.

BR,
Tuomas

First of all you should off course double check, but when you've done that, you could try the following: The sequence of simulating a model is that the model is first converted to a Modelica model and then solved as such with either OpenModelica or the internal solver. Since the latest version of Op...

The syntax error you get is due to a bug in the Modelica parser of the tool. I've fixed that now and the change is active onward from the next nightly. However, it seems that the model you sent simulates with OpenModelica even with the broken Modelica parser; certain syntax errors break the simulati...

Actually the b673 was skipped so the changes will be effective from b674 onwards. The build is now available.

The trunk version now supports Modelica libraries, they can be enabled in the Model properties (in the selection view of the model Configuration) by checking the "Use Modelica libraries" checkbox. The changes will be included onward from the next nightly (b673). Nightlies are found at: http://www.si...

Hi,

I've looked at the problem, and that cannot be done in a straightforward manner in the current release (no support for functions as arguments nor usage of the whole standard Modelica library), but I'll tackle this issue and this will probably be available in the Thursday-Friday nightly.