Override of Q-Idents

[Lennart Ochel]

The simulation command line flag -override is quite useful. Unfortunately, it is not working for Q-Idents, because inverted commas are not passed to the simulation. Has anyone an idea how to fix it?

The issue can be tried using the following example script.

loadString("
model foo
  Real x(start=1.0);
  Real 'y'(start=1.0);
  parameter Real p=1.0;
equation
  der(x) = p;
  der('y') = p;
end foo;
"); getErrorString();

simulate(foo, stopTime=0.0); getErrorString();
val(x, 0.0); getErrorString();
val('y', 0.0); getErrorString();

simulate(foo, stopTime=0.0, simflags="-override=p=-2,x=0,\'y\'=0 -lv=LOG_SOLVER"); getErrorString();
val(x, 0.0); getErrorString();
val('y', 0.0); getErrorString();

x is working as expected, whereas 'y' is not.

BTW: Whitespaces (and probably other strange valid characters) in Q-Idents will not work too.

[Martin Sjölund]

Yes, because you did not escape your override flag. The following works fine:

simflags="\"-override=p=-2,x=0,\'y\'=0\" -lv=LOG_SOLVER"

Note that to do what you want to without caring about shell escapes, simflags would need to be an array of arguments, like:

simflags={"-override=p=-2,x=0,\'y\'=0","-lv=LOG_SOLVER"}

[Lennart Ochel]

Replying to sjoelund.se:

Yes, because you did not escape your override flag. The following works fine:

simflags="\"-override=p=-2,x=0,\'y\'=0\" -lv=LOG_SOLVER"

Great, thanks!

[Lennart Ochel]

If you change 'y' to 'y y' even val fails.

NaN
"Error: 'y y' not found in /home/lochel/Documents/tests/ticket2825/foo_res.mat
"

[Martin Sjölund]

readSimulationResultVars returns {"'yy'","der('yy')","der(x)","p","time","x"}, so it looks like the simulation reader converts the variable names (octave shows that the file contains the spaces).