Pendulum does not simulate

[Martin Sjölund]

Pendulum does not simulate, seems to be because everything is solved using division (shouldn't this be avoided at all costs?):

class pendulum 
  constant Real PI = 3.14159; 
  parameter Real m = 1,g = 9.81,L = 0.5; 
  Real F; 
  output Real x(start = 0.5),y(start = 0); 
  output Real vx,vy; 
equation 
  m * der(vx) = -x / L * F; 
  m * der(vy) = -y / L * F - m * g; 
  der(x) = vx; 
  der(y) = vy; 
  x ^ 2 + y ^ 2 = L ^ 2; 
end pendulum;

From our ​forums

[Jens Frenkel]

THe pendulum model requires dynamic state selection. It is not enabled by default. You can enable it by setting

setMatchingAlgorithm("PFPlusExt");
setIndexReductionMethod("dynamicStateSelection");

[Martin Sjölund]

I opened up #1820 to have these options in OMEdit, and will close this since it is indeed working.