One of Yanhua mini ACDP users was trying to read BMW MSV80 DME ISN with module 3 and interface board but failed. ACDP Mini says device does not obtain authorization of A51E module. Here is the working solution.
Follow the menu path here:
DME ISN->OBD/CAN Mode Read/Write ISN->Read MSV80/MSV801 DME ISN
If read by OBD/CAN mode, ACDP will not asks for A51E license.
If you select bench mode to read MSV80 ISN, A51E license is required.
A51E license is for ACDP Mini module 27. Module 7 use special interface board to read ISN on bench mode.