Avoid machine precision issues while using FindRoot?

Questions
1

I am facing Precision error in Find Root
FindRoot::lstol: The line search decreased the step size to within tolerance specified by AccuracyGoal and PrecisionGoal but was unable to find a sufficient decrease in the merit function. You may need more than MachinePrecision digits of working precision to meet these tolerances.

2

What is your question then? If it is about a specific computation, you will need to supply the computation in copy/pastde form.

3

Sir my question is that what will be the command to remove this error. I attached the relevant computation. You can see the following errors in it. Normally when i do such type of calculations which are very smooth and fast.

image_2019_06_16T18_03_14_654Z.png
image_2019_06_16T18_03_14_654Z.png1366×768 100 KB

image_2019_06_18T14_37_31_305Z.png
image_2019_06_18T14_37_31_305Z.png1366×768 93.3 KB

image_2019_06_18T14_38_43_714Z.png
image_2019_06_18T14_38_43_714Z.png1366×768 92.7 KB

image_2019_06_18T14_40_28_946Z.png
image_2019_06_18T14_40_28_946Z.png1366×768 98.1 KB

4

Sir my question is that what will the command to remove this error. I attached the relevant computation. You can see the following errors in it

5

It would be a good idea to isolate a single stand-alone FindRoot call that elicits the problem.

One thing I can point out is that some of the values have very different scales and so maybe rescaling will help. Also you can lower the PrecisionGoal and related settings.