Solved by HDCharles in post #2 
              
              
                Hi Arpan, 
The error you are getting is more or less from here: 


i.e. that op seems to be for sparse tensors, not quantized ones. Its complaining because it doens’t list QuantizedCPU in the dispatch section of that op. I’m not sure exactly what you are doing for the system to be giving you that er…