Length of faceIds is not in valid range for IdentifyTask

[vunguyen7797]

I executed an Identify faces from a Large group person. However, if I identify faces in a photo which has more than 10 faces, I will get the error "The length of faceIds is not in a valid range".

I suspected that the number of faces that can be identified at the same time is limited. How can I increase the limit of number of faces to be identified at once?