Failed call to cuInit CUDA_ERROR_NOT_INITIALIZED (Device mapping: no known devices)

I have 2 GPU’s but not able to utilize via tensorflow-GPU, could anyone help to figure it out the issue.

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import tensorflow as tf
a = tf.constant([1.0, 2.0, 3.0, 4.0, 5.0, 6.0], shape=[2, 3], name=‘a’)
b = tf.constant([1.0, 2.0, 3.0, 4.0, 5.0, 6.0], shape=[3, 2], name=‘b’)
c = tf.matmul(a, b)

with tf.Session(config=tf.ConfigProto(log_device_placement=True)) as sess:
print (sess.run©)
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Warning/Error message:

2018-11-09 12:06:42.827220: E tensorflow/stream_executor/cuda/cuda_driver.cc:406] failed call to cuInit: CUDA_ERROR_NOT_INITIALIZED
2018-11-09 12:06:42.827292: I tensorflow/stream_executor/cuda/cuda_diagnostics.cc:158] retrieving CUDA diagnostic information for host: ca47dppaia001
2018-11-09 12:06:42.827309: I tensorflow/stream_executor/cuda/cuda_diagnostics.cc:165] hostname: ca47dppaia001
2018-11-09 12:06:42.827370: I tensorflow/stream_executor/cuda/cuda_diagnostics.cc:189] libcuda reported version is: 410.72.0
2018-11-09 12:06:42.827419: I tensorflow/stream_executor/cuda/cuda_diagnostics.cc:369] driver version file contents: “”“NVRM version: NVIDIA UNIX ppc64le Kernel Module 410.72 Wed Oct 17 20:19:50 CDT 2018
GCC version: gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC)

“””
2018-11-09 12:06:42.827457: I tensorflow/stream_executor/cuda/cuda_diagnostics.cc:193] kernel reported version is: 410.72.0
2018-11-09 12:06:42.827471: I tensorflow/stream_executor/cuda/cuda_diagnostics.cc:300] kernel version seems to match DSO: 410.72.0
Device mapping: no known devices.
2018-11-09 12:06:42.871454: I tensorflow/core/common_runtime/direct_session.cc:265] Device mapping: