data(Boston, package='MASS')
y <- Boston$nox
x <- Boston$dis
nls(y~ A + B * exp(C * x), start=list(A=1, B=1, C=1))

Error in nls(y ~ A + B * exp(C * x), start = list(A = 1, B = 1, C = 1),  :
  step factor 0.000488281 reduced below 'minFactor' of 0.000976562

I don't know how to fix this error. I think my problem is that I set the
wrong start. Could somebody help please?

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