Solved by Naman-ntc in post #2 
              
              
                The file s2-gap-12dates.csv, does it contain labels from 1 to num_classes or from 0 to num_class -1? 
Cross Entropy loss asumes target from 0 to num_class -1 ? 
And the error Assertion cur_targer >= 0 && cur_target < n_classes failed that means there is some problems with your labels, and this is th…