Failing to load function from dynamic library

[abhinonymous]

Gpu: titanX ubuntu 14.04 cuda 3.007

I get the following error when running persistent-rnn-benchmark
I think libcudnn.so is used for this particular function call

xyz@ubuntu15:~/bin$ ./persistent-rnn-benchmark 
terminate called after throwing an instance of 'std::runtime_error'
  what():  Failed to load function 'cudnnCreateDropoutDescriptor' from dynamic library.
Aborted (core dumped)

Please let me know if you need more details to resolve this issue @gdiamos