Fit did not converge on dose response data

Hi,

I am getting some cases where there are no fit on my dose response data. An example is shown below.

Thanks for your help!

   

Armand

FitDidNotConverge.jpg

DoseResponse
1.36898.7
0.89170.1
0.4142.7
-0.063-1.9
-0.5395.7
-1.0176.3
-1.4946.3
-1.9714.6
-2.4481.6
-2.92552.4