Constructs that are unsupported by JModelica

[Mathadon]

An overview (updated) of some constructs that are not supported by JModelica/CasADi:

• if/then else constructs, except when embedded in equations, see ConstantEffectiveness #8
• certain for loops
• when/while statements
• therefore flow junctions are also not supported as far as I know
• discrete variables
• external C functions (e.g. tables)
• algorithm sections?

@dhblum do you have the same experience?

[dhblum]

Sorry I'm just responding now.

I haven't tested external C functions and have to double check algorithms. But the others are my experience as well. In addition not supported:

• for/when/while loops
• tables

Some of these constructs (like loops and if/else) are supported in the instantiation section of the model file, but not the equations section.

[Mathadon]

Tables are implemented through C-code, so that makes sense.
Some for loops can be reformulated such that they do work, e.g.:

Real[5] d;
for i in 1:5 loop
d[i] = time^i;
end for;

use instead:

d = {time^i for i in 1:5};

Such a for loop is expanded during translation, but that only works for 'for expressions' that do not depend on time-depending variables of course.

My experience is also that using inline=True can help to get some functions to work.

[Mathadon]

@saroele This can be of interest!

[saroele]

Yep, this is indeed a good overview, thanks! This page can also help in case you run into problems:
http://www.jmodelica.org/api-docs/usersguide/2.0/ch11.html