Incomplete installation!A driver of version at least 440.00 is required for CUDA 10.2 functionality to work

I m gettng following warning after installing CUDA 10.2 even if I have latest nvidia driver 440.64:
***WARNING: Incomplete installation! This installation did not install the CUDA Driver. A driver of version at least 440.00 is required for CUDA 10.2 functionality to work.
Is the installation really incomplete or should I ignore this warning?