DIVA Illuminance images

Re DIVA daylight simulation :

How it is possible (if at all) to produce the following :

Illuminance (lux) images. This doesn't seem to be an option.  

Illuminance (lux) mesh data. This is an option but when I run it, the result is null. (kWhrs/m2 and daylight factor seem to work fine) 

Regards

Hareth