Do you mean “PD4ML v3 compatibility API of PD4ML v4”?
If yes, I would recommend to try v4.0.8, or even better v4.0.9 snapshot. v4.0.9 release is expected the next week.
I use v4.0.7 and for v3 code using package “org.zefer.pd4ml.PD4ML” for compatibilty.
Are you talking about that for v3 compatibility?