id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
4270	Sorting of Eqns and Variable in Backend	Willi Braun	Willi Braun	"In the attached script the simulation result of the model A and model B is different due to a different order of components in model definition. This may be caused by the modules removeSimpleEquation or Tearing (or maybe something else ?), since this modules based on heuristics that have a different output on different input.
Also connected to #3397.

We already have a modules that can fix the issue in the attached model {{{--preOptModules+=sortEqnsVars}}}. This pre-optimization module currently sorts the equations and variables by there amount of appearance in the adjacency matrix. This might be still not a fully deterministic behavior, so  we probably need further criteria.

Should this modules become enabled by default?
"	defect	reopened	high		Backend				francois.beaude@… Francesco Casella Bernhard Bachmann vruge Lennart Ochel Patrick Täuber