ode89 and ode78 are unrecognized in MATLAB 2021a

Why I cannot run ode89 and ode78 in MATLAB 2021a? How can I check out what ode functions are installed in my matlab? . I keep getting the folowng error:

Unrecognized function or variable 'ode78'.

[Stephen23]

"How can I check out what ode functions are installed in my matlab?"

Look in the documentation of your installed MATLAB.

Answer 1

[Star Strider]

From the last line in the ode78 and ode89 documentation —

Introduced in R2021b

.