Model:  Modelica.Electrical.Analog.Examples.HeatingNPN_NORGate
┌ Warning: The initialization system is structurally singular. Guess values may significantly affect the initial values of the ODE. The problematic variables are SymbolicUtils.BasicSymbolicImpl.var"typeof(BasicSymbolicImpl)"{SymbolicUtils.SymReal}[var"T1.B.i"(t), var"T1.C.i"(t), var"V2.signalSource.T_start"(t), var"V1.signalSource.T_start"(t), var"V1.signalSource.count"(t), var"T2.vbe"(t), var"T2.is_t"(t)].
│ 
│ Note that the identification of problematic variables is a best-effort heuristic.
└ @ ModelingToolkitBase /home/runner/.julia/packages/ModelingToolkitBase/Sq573/src/problems/initializationproblem.jl:98
┌ Warning: Initialization system is underdetermined. 12 equations for 19 unknowns. Initialization will default to using least squares. `SCCNonlinearProblem` can only be used for initialization of fully determined systems and hence will not be used here.
│ 
│ 
│ To suppress this warning, pass `warn_initialize_determined = false`. To turn this warning into an error, pass `fully_determined = true`.
└ @ ModelingToolkit /home/runner/.julia/packages/ModelingToolkit/bx5sR/src/initialization.jl:25
Time:    2.701 s
Success: true