Afdust_adj NCVGT Error (NetCDF dimension)

There is no problem on MCIP files. METDOT is designed to stores the vector values from all corners (dots) of grid cell while METCRO files are for the scalar values from the center (cross) of grid cell. That is why METDOT has an extra dimension compared to METCRO.
You should use the METCRO2D file for the adjustment.