Problem when training

[M-Ghorbel]

Hello,
i'm trying to run train_JPPNet-s2.py but i'm getting this error:

InvalideArgumentError (see above for traceback): Cannot assign a device for operation 'Tower_0/stridded_slice_4': Could not satisfy explicit device specification '/device:GPU:0' because no kernel for GPU devices is available.
Any help please?
thank you