Iris detection - OSError

Hello,
I have the H7 plus camera and I would like to do iris detection.
The example program does not work ("OSError: could not find the file).
The topics dealing with this problem are old.
Can you help me? Which example file should I use?

Hi, we disabled the IRIS Haar Cascade to save firmware space on the H7 Plus.

If you’d like to re-enable it you can do so by forking our repo on github, enable github actions, uncomment this and then save that change and the automated build system will rebuild the firmware for you with the eye cascade enabled. Then use the Run Bootloader feature in OpenMV IDE under tools to load the OpenMV4P/firmware.bin file to enable the cascade.

Alternatively, if you have the RT1062 we have more firmware space on that board so the eye cascade is enabled by default.