Assertion fails, core dumps

[maxnbk]

rawtoaces: [...]/src/rawtoaces/lib/rta.cpp:814: int rta::Idt::loadIlluminant(const std::vector<std::basic_string >&, std::string): Assertion `paths.size() > 0 && !type.empty()' failed.
Aborted (core dumped)

[miaoqi]

It is possible that the "illuminant" data path is problematic or set up correctly.

Did you set up your path to the "data"?

Thanks!

[maxnbk]

content of my environment variable AMPAS_ILLUMINANT_PATH contains single directory which contains iso7589_stutung_380_780_5.json , and AMPAS_CAMERA_SENSITIVITIES_PATH points to directory which contains arri, canon, nikon, sony jsons.
If I point it to directory one above, same error.

It seems this only works if I set AMPAS_DATA_PATH but the other vars do not work for this purpose.