TypeError: Expected int32, got list containing Tensors of type '_Message' instead.

[vinayakumarr]

python generate.py
giving the following error

File "generate.py", line 38, in
z = z.sg_concat(target=[target_cval_1.sg_expand_dims(), target_cval_2.sg_expand_dims()])
File "/usr/local/lib/python2.7/dist-packages/sugartensor/sg_main.py", line 151, in wrapper
out = func(tensor, tf.sg_opt(kwargs))
File "/usr/local/lib/python2.7/dist-packages/sugartensor/sg_transform.py", line 216, in sg_concat
return tf.concat(opt.dim, [tensor] + target, name=opt.name)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/ops/array_ops.py", line 1096, in concat
dtype=dtypes.int32).get_shape().assert_is_compatible_with(
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/ops.py", line 836, in convert_to_tensor
as_ref=False)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/ops.py", line 926, in internal_convert_to_tensor
ret = conversion_func(value, dtype=dtype, name=name, as_ref=as_ref)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/constant_op.py", line 229, in _constant_tensor_conversion_function
return constant(v, dtype=dtype, name=name)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/constant_op.py", line 208, in constant
value, dtype=dtype, shape=shape, verify_shape=verify_shape))
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/tensor_util.py", line 383, in make_tensor_proto
_AssertCompatible(values, dtype)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/tensor_util.py", line 303, in _AssertCompatible
(dtype.name, repr(mismatch), type(mismatch).name))
TypeError: Expected int32, got list containing Tensors of type '_Message' instead.