This message is generated when the tolerances specified through the AccuracyGoal or PrecisionGoal options cannot be reached using the indicated working precision.
This message can be generated if the objective function is singular or has some other sharp feature.
Off[message] switches off the message; On[message] switches it on. For example: Off[FindMinimum::fmdig].
Examples
Basic Examples(1)
This function does not have a smooth minimum:
A minimum can be computed by giving two starting values for the variable: