FailedPreconditionError在TensorFlow

Question

保存變量時，我試圖通過表達

saver2 = tf.train.Saver(tf.all_variables()) 
saver2.save(sess, '/home/username/learning/tensor/tffiles/ww/') 

保存的權重而保存失敗因這個錯誤：

FailedPreconditionError (see above for traceback): 
/home/username/learning/tensor/tffiles/ww/.tempstate2977384776137285958 

[[Node: save_1/save = SaveSlices[T=[DT_FLOAT, DT_FLOAT, DT_FLOAT, 
DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, 
DT_FLOAT, DT_FLOAT], _device="/job:localhost/replica:0/task:0/cpu:0"] 
(_recv_save_1/Const_0, save_1/save/tensor_names, 
save_1/save/shapes_and_slices, conv1/biases, conv1/weights, conv2/biases, 
conv2/weights, f1/_9, f2/_11, local3/biases, local3/weights, local4/biases, 
local4/weights, softmax_linear/biases, softmax_linear/weights)]] 

哪裏從何而來的錯誤？

Answer 1

問題是與行，

saver2.save(sess, '/home/username/learning/tensor/tffiles/ww/') 

它缺乏CKPT文件的名稱明確指定，而應該是

saver2.save(sess, '/home/username/learning/tensor/tffiles/ww/model.ckpt')