When using a PRT Volume, if you increase the Particles Per Voxel to 2 while the “Enable Jittering” is not activated you get an error:
“multi_sample_generator::shuffle_indices() There were more particles requested than random sample points created.”
Thanks for the report!
Funnily enough, this was the first bug I found and logged when I installed KC4D. Thus it is already logged as a bug internally. 
Keep them coming!