Hi,

in the solver statistic the value "error test failures"
just means that in the  "DASSL" integrator an internal
error test has failed and that results in a new
calculation of the current step with a reduced internal
step size.
So if the number is quite high the solver
will be quite slow and it indicates that your problem
is quite stiff.
However, the simulation is successful as long you don't
get other messages that indicate a failing simulation.

so long.
Willi

Thanks for the information, Willi. That was really helpful.

I have a follow up question though.

When solving few examples I've noticed this error popping up in the compilation tab of the simulation window.


Modelica.Blocks.Examples.PID_Controller_05evt.c: In function 'Modelica_Blocks_Examples_PID_Controller_zeroCrossingDescription':
Modelica.Blocks.Examples.PID_Controller_05evt.c:59: warning: assignment discards qualifiers from pointer target type

Can I get more information on what this is?

It's not as bad as all that.
We have just forgot to cast some assignments, but
that is done by the c compiler anyway.

so long.
Willi