I have made some more test using the main two methods of using AI-masks:
The predefined AI-preset masking method AND The freehand-hoovering-select-method and found some interesting results.
It is the use of the predefined AI-presets that is causing all the problems with “Internal Errors” we have seen so far with AI-masking. These problems seems simply not be there or occur when using the other method and in the link below I have done export tests with two RAW-pictures developed with these two methods and edited them in simalar ways. The results are very clear: The export with the premade-AI-preset edited picture took FIVE TIMES LONGER TIME than with the other method.