r2015B vs r2014A plotting

Hi,

I know this sounds like a very strange problem but I am having trouble plotting on R2015B. I figured my script was wrong, but when I sent my friends (who has R2014A) the script and they ran it, they had a curve. However, when I and several others who have R2015B ran it, we would have the axes and title but no curve. This has happened to several curves and I am not sure how to fix it or even how to downgrade.

Thank you in advance for all your help!

[Walter Roberson]

Please post your code