You must feed a value for placeholder tensor 'model/input_1' with dtype float and shape [?,160,240,1]

[wangcc123-dave]

InvalidArgumentError (see above for traceback): You must feed a value for placeholder tensor 'model/input_1' with dtype float and shape [?,160,240,1]
[[Node: model/input_1 = Placeholderdtype=DT_FLOAT, shape=[?,160,240,1], _device="/job:localhost/replica:0/task:0/device:GPU:0"]]

When I run my self-defined model at my own datasets,this bug occured.I executed the code: ./scripts/run_local.sh nets/unet_at_luanpao_run.py