matlab opti toolbox error can anybody rectify?

i am getting error in program in which i have using opti toolbox can any body rectify this error

Undefined function or variable 'optiset'.

opts = optiset('solver','cbc');

u can see in website ('https://www.inverseproblem.co.nz/OPTI/index.php/Advanced/Opts','-new');

Answer 1

[Sabin]

I believe there is a typo. The function is probably 'optimset'.