id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
2319	no support for discrete equation systems	Lennart Ochel	probably noone	"Some discrete variables may be involved in equation systems. This is currently not supported.

{{{#!mo
model foo
  Real a;
initial equation 
  pre(a)^2 + a^2 = 9;
equation 
  when {sample(0.1, 0.1)} then
    a = time;
  end when;
end foo;
}}}

Error log:
{{{
Translation | No system for the symbolic initialization was generated. A method using numerical algorithms will be used instead.
Translation | Interner Fehler Transformation Module sort components failed!
Translation | Interner Fehler sorting equations(strongComponents failed)
Translation | Interner Fehler ./Compiler/BackEnd/BackendDAETransform.mo: function analyseStrongComponentBlock failed
Translation | Interner Fehler Sorry - Support for Discrete Equation Systems is not yet implemented
              $PRE.a
              a
              $PRE.a ^ 2.0 + a ^ 2.0 = 9.0
              a = $PRE.a
}}}"	defect	new	high	1.9.0	Backend	trunk