Cannot get TH2 double ratio

Hi all,

I would like to compute the TH2 histogram that is the double ratio of 4 TH2 Histos. I can creat the two “single” ratios, but when I divide the two histograms that I get, the result is an empty histogram. I wonder if it is possible to obtain a doulble ratio of TH2 histograms by dividing them.
You can find my script attached.

Thanks in advance!

double_ratio_th2.C (1.26 KB)