An unexpected error occurred during CUDA execution

[Bhee]

While running fast_rcnn_train.m. occured following error:

Warning:

   An unexpected error occurred during CUDA execution. The CUDA error was:
   Unknown error code
   Error using vl_nnconv
   An unexpected error occurred during CUDA execution. The CUDA error was:
   unknown error

   Error in dagnn.Conv/backward (line 21)
   [derInputs{1}, derParams{1}, derParams{2}] = vl_nnconv(...

   Error in dagnn.Layer/backwardAdvanced (line 120)
   [derInputs, derParams] = obj.backward ...

   Error in dagnn.DagNN/eval (line 119)
   obj.layers(l).block.backwardAdvanced(obj.layers(l)) ;

   Error in cnn_train_dag>processEpoch (line 218)
   net.eval(inputs, params.derOutputs, 'holdOn', s < params.numSubBatches) ;

   Error in cnn_train_dag (line 87)
   [net, state] = processEpoch(net, state, params, 'train') ;

   Error in fast_rcnn_train (line 89)
   [net,info] = cnn_train_dag(net, imdb, @(i,b)

Spec : Windows 7, cuda toolkit 7.5,GPU: Titan X 12GB , Matlab 2014a, device driver version 375.70

Kindly help me to solve this.