id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
3087	Warn about iteration variables with default values	Francesco Casella	Lennart Ochel	"In many cases (e.g. thermo-fluid models), the default start attribute of zero is not at all a good choice for a first guess of nonlinear solvers - it might actually be out of the range of validity of fluid models. 

Suggestion: when a variable is selected as iteration variable for an iterative solver, if the start attribute has not been set and is still the basic type default issue a warning such as:

Warning: Variable xxx is an iteration variable for the nonlinear solver and its start attribute has not been set, using the default value of yyy as initial guess might lead to numerical problems. In that case, please set the start attribute to a more appropriate value."	defect	closed	critical	1.9.2	Backend	trunk	invalid		Adrian Pop