If you or your organization (university or company) once owned a license for 2012, you can still download it: Go to the MathWorks Downloads page . Sign in with your MathWorks Account.
If you are looking for evidence of what was "fixed" in the 2012 releases of MATLAB, you should refer to the official Release Notes Bug Reports provided by MATLAB R2012a Release Notes download fixed matlab 2012
In the world of numerical computing and academic engineering, few versions have garnered as much lasting loyalty as (formally known as R2012a and R2012b). For many researchers, students, and professionals working with legacy code, older Simulink models, or specific toolboxes that were never updated, MATLAB 2012 remains an indispensable tool. If you or your organization (university or company)