No velocity vector and GCP when performing Offset tracking

Dear all,
I am using snap version 4, and I follow tutorial with glacier monitoring using offset tracking. However, in my results snap didnt give me ground control points and velocity vector layer. I have the velocity results as raster in band but for visualisation purposes a need velocity to export this to shapefile. Does anybody know what is the problem?

Please try with fully updated SNAP7.0 and see if the problem persists. SNAP has developed a great deal since verison 4.