# User Portlet

Guido Wolf Reichert
Discussions
(cross-posted on [StackOverflow][1]) Unspecified array dimensions using [:] are very important to write flexible components for frequent reuse. While I am aware, that the actual size of an array has to be determined at the time a model is...
> A support case with the identification [CASE:4275098] was created. ---------- While I noted some implementation problems regarding inner and outer in [another context][1] which have been acknowledged, I would like to get very general...
> A support case with the identification [CASE:4272754] was created. ---------- (cross-posted on [StackOverflow][1]) ## Motivation ## Building more complex components (e.g. subsystems in a larger model) inevitably leads to a growing...
## Problem Description & Motivation: Using Non-SI-Units for time ## This post culminates earlier questions I voiced on Community ([Unit checking and making use of unit attributes][1] and [Why can't a parameter be used to set the unit...
Hi, I found these recommendations for handling parameters at the top-level of models for Dymola: [Handling of Modelica Model's Parameters][1] Would these also be best-practice recommendations for the System Modeler or are there notable...
Hi everyone, I just noted that the icons for some components I have created are not properly visualized when having them displayed in Mathematica using SytemModel["model"]["Diagram"]. Here is a very short minimal example for the behavior: ...
Hi everybody, The following minimal example does compile without any problems in WSM 4.3 and 5.1. But it will cause an error in WSM 12.0 all of a sudden: model UnitErrorModel MyComponent c( hasUnit = "myUnit" ); block...
Hi everybody, coming from [System Dynamics][1] I am wondering how stopping a simulation, changing variables (including state reinitialization), and continueing the simulation can be achieved from the outside (e.g. using Mathematica's integration...
*I have posted a similar question on StackOverflow ([here][1]), as it seems -- with the alleged exception of SimulationX -- to appear in System Modeler as well as in OpenModelica and Dymola. I believe that the issue may be of interest for this...
Hi everybody, I am creating a library for *System Dynamics* modeling which unlike the existing free library by Cellier is making use of acausal connectors. For "Flow" - Elements I have a generic flow class that defines the interfaces: ...