Something strange in MATLAB

I have a code that optimizes three parameters and fits the data using Fmincon (including lower and upper bound). And I have three text data as three different input data. I just change the name of the load to try the same code for all cases.

Like this:

load TRT_mean.txt

to:

load TRT_mean_V1.txt

Until yesterday was good but now does not work properly and today's output and also iterations are totally different!

Is it possible software keeps previous results?

Answer 1

[Matt J]

Chances are the issue is not in the code, but in the new data that you have supplied as input. For some reason, this input data set doesn't satisfy assumptions that previous data sets did.

[Saeid Bina]

I am trying the same data and same boundries for the fmincon. I did last time and saved all itterations but today the function does not gave the same iteration and result.

[Matt J]

Then perhaps you are using a different version of Matlab? Something had to have changed.