id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1818	Pendulum does not simulate	Martin Sjölund	Jens Frenkel	"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 [https://www.openmodelica.org/index.php?option=com_agora&task=topic&id=714&Itemid=87 forums]"	defect	closed	critical	1.9.0	Backend	trunk	invalid