Intel Opencl memory issue

I have two aocx fpga binary files which I run one after the other . Both of them leads to large amount of memory transfer from host side to Fpga. Issue currently I am facing is that when I run both codes independently when nothing is programmed on fpga( by restarting the system), I get correct results. But when I try to run one after the other problem is that my results are changing everytime I run. So I think it is because I am not freeing any memory buffer, I do not know how to do that. Could that be a reason for that, if yes, can anyone tell me how I can free allocated memory buffer ?