Hi Chinwe,
Generally Curve Fitting and Optimizations algorithms require you to give a starting point satisfying all your contraints(if any) from where the algorithms starts its logic and tries to find the best fit/best solution. In this case, you did not specify the starting point, hence the warning. But the algorithm needs a starting point, therefore it chooses a random starting point. Howecver this is not an error and may not affect your algorithm/results much. Please note in some case choice of starting point affects the solution.
I hope it was helpful.
Thanks
