Why did my outputs change?

I ran a repeat of an optimization function I ran last week, but my outputs have changed as of today. I use the interior-point solver via the lsqlin() command. I do not really understand why. Any advice or suggestions?

[Jan]

The question contains too few details to be answered.

Did you change the parameters, the initial data, the computer, the Matlab version? Are there any random initilizations in the code?

[Adam Rish]

Nothing has changed. I was just repeating the same code, same inputs, same data, etc. There are no random initilzations. The only thing that changed was that the MatLab was updated to version 9 but reviewing the update notes, I did not see anything that would indicate a change.

[DGM]

Since v9.0 was R2016a, it's worth asking:

Do you really mean version 9.0, or do you mean 9.9?

What version/release did you start with?

The release notes don't describe every detail that might potentially contribute to numerical differences in results.

[Adam Rish]

I have MatLab R2019b version 9.7 and Global Optimization Toolbox R2019b version 4.2

I'm not exactly sure what version I started with, but I am assuming it would be version 9.6. I do know it was R2019b