Namrita Varshney

thank you for reply.look at the code , I was not able to add   sol = model.cbGetSolution(variables) in callback_tree function, So I created a dictionary to find my solution , it can be the case the...

 is it true that Gurobi always executes the callback only after finding the feasible solution?? or it can be the case that during the callback gurobi does not have the complete model solution??