Could not load dynamic library 'cudart64_101.dll' on tensorflow CPU-only installation
PythonPython 3.xTensorflowKerastensorflow2.0Python Problem Overview
I just installed the latest version of Tensorflow via pip install tensorflow and whenever I run a program, I get the log message:
> W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'cudart64_101.dll'; dlerror: cudart64_101.dll not found
Is this bad? How do I fix the error?
Python Solutions
Solution 1 - Python
Tensorflow 2.1+
What's going on?
With the new Tensorflow 2.1 release, the default tensorflow pip package contains both CPU and GPU versions of TF. In previous TF versions, not finding the CUDA libraries would emit an error and raise an exception, while now the library dynamically searches for the correct CUDA version and, if it doesn't find it, emits the warning (The W in the beginning stands for warnings, errors have an E (or F for fatal errors) and falls back to CPU-only mode. In fact, this is also written in the log as an info message right after the warning (do note that if you have a higher minimum log level that the default, you might not see info messages). The full log is (emphasis mine):
>2020-01-20 12:27:44.554767: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'cudart64_101.dll'; dlerror: cudart64_101.dll not found > >2020-01-20 12:27:44.554964: I tensorflow/stream_executor/cuda/cudart_stub.cc:29] Ignore above cudart dlerror if you do not have a GPU set up on your machine.
Should I worry? How do I fix it?
If you don't have a CUDA-enabled GPU on your machine, or if you don't care about not having GPU acceleration, no need to worry. If, on the other hand, you installed tensorflow and wanted GPU acceleration, check your CUDA installation (TF 2.1 requires CUDA 10.1, not 10.2 or 10.0).
If you just want to get rid of the warning, you can adapt TF's logging level to suppress warnings, but that might be overkill, as it will silence all warnings.
Tensorflow 1.X or 2.0:
Your CUDA setup is broken, ensure you have the correct version installed.
Solution 2 - Python
To install the prerequisites for GPU support in TensorFlow 2.1:
- Install your latest GPU drivers.
- Install CUDA 10.1.
- If the CUDA installer reports "you are installing an older driver version", you may wish to choose a custom installation and deselect some components. Indeed, note that software bundled with CUDA including GeForce Experience, PhysX, a Display Driver, and Visual Studio integration are not required by TensorFlow.
- Also note that TensorFlow requires a specific version of the CUDA Toolkit unless you build from source; for TensorFlow 2.1 and 2.2, this is currently version 10.1.
- Install cuDNN.
- Download cuDNN v7.6.4 for CUDA 10.1. This will require you to sign up to the NVIDIA Developer Program.
- Unzip to a suitable location and add the bin directory to your PATH.
- Install tensorflow by
pip install tensorflow. - You may need to restart your PC.
Solution 3 - Python
TensorFlow 2.3.0 works fine with CUDA 11. But you have to install tf-nightly-gpu (after you installed tensorflow and CUDA 11): https://pypi.org/project/tf-nightly-gpu/
Try:
pip install tf-nightly-gpu
Afterwards you'll get the message in your console:
I tensorflow/stream_executor/platform/default/dso_loader.cc:48] Successfully opened dynamic library cudart64_110.dll
Solution 4 - Python
I solved this another way. First of all I installed cuda 10.1 toolkit from this link.
Where I selected installer type: exe(local) (for windows) and installed 10.1 in custom mode (without visual studio integration, NVIDIA PhysX because previously I installed CUDA 10.2 so required dependencies were installed automatically)
After installation, From the Following Path
(C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\bin)
, in my case, I copied cudart64_101.dll file and pasted in
(C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.2\bin).
Then importing Tensorflow worked smoothly.
Solution 5 - Python
In my case the tensorflow install was looking for cudart64_101.dll
The 101 part of cudart64_101 is the Cuda version - here 101 = 10.1
I had downloaded 11.x, so the version of cudart64 on my system was cudart64_110.dll
This is the wrong file!! cudart64_101.dll ≠ cudart64_110.dll
Solution
Download Cuda 10.1 from https://developer.nvidia.com/
Install (mine crashes with NSight Visual Studio Integration, so I switched that off)
When the install has finished you should have a Cuda 10.1 folder, and in the bin the dll the system was complaining about being missing
Check that the path to the 10.1 bin folder is registered as a system environmental variable, so it will be checked when loading the library
You may need a reboot if the path is not picked up by the system straight away
Solution 6 - Python
In a conda environment, this is what solved my problem (I was missing cudart64-100.dll:
-
Downloaded it from dll-files.com/CUDART64_100.DLL
-
Put it in my conda environment at
C:\Users\<user>\Anaconda3\envs\<env name>\Library\bin
That's all it took! You can double check if it's working:
import tensorflow as tf
tf.config.experimental.list_physical_devices('GPU')
Solution 7 - Python
This answer might be helpful if you see above error but actually you have CUDA 10 installed:
pip install tensorflow-gpu==2.0.0
output:
I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cudart64_100.dll
which was the solution for me.
Solution 8 - Python
This solution worked for me :
I preinstalled the environnement with anaconda (here is the code)
conda create -n YOURENVNAME python=3.6 // 3.6> incompatible with keras
conda activate YOURENVNAME
conda install tensorflow-gpu
conda install -c anaconda keras
conda install -c anaconda scikit-learn
conda install matplotlib
but after I had still these warnings
2020-02-23 13:31:44.910213: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'cudart64_101.dll'; dlerror: cudart64_101.dll not found
2020-02-23 13:31:44.925815: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cublas64_10.dll
2020-02-23 13:31:44.941384: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cufft64_10.dll
2020-02-23 13:31:44.947427: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library curand64_10.dll
2020-02-23 13:31:44.965893: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cusolver64_10.dll
2020-02-23 13:31:44.982990: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cusparse64_10.dll
2020-02-23 13:31:44.990036: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'cudnn64_7.dll'; dlerror: cudnn64_7.dll not found
How I solved the first warning : I just download a zip file wich contained all the cudnn files (dll, etc) here : https://developer.nvidia.com/cudnn
How I solved the second warning : I looked the last missing file (cudart64_101.dll) in my virtual env created by conda and I just copy/pasted it in the same lib folder than for the .dll cudnn
Solution 9 - Python
Tensorflow 2.1 works with Cuda 10.1.
If you want a quick hack:
- Just download
cudart64_101.dllfrom here. Extract the zip file and copy thecudart64_101.dllto your CUDAbindirectory
Else:
- Install Cuda 10.1
Solution 10 - Python
I installed cudatoolkit 11 and copy dll
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.1\bin to C:\Windows\System32.
It fixed for PyCharm but not for Anaconda jupyter:
> [name: "/device:CPU:0" device_type: "CPU" memory_limit: 268435456
> locality { } incarnation: 6812190123916921346 , name: "/device:GPU:0"
> device_type: "GPU" memory_limit: 13429637120 locality { bus_id: 1
> links { } } incarnation: 18025633343883307728 physical_device_desc:
> "device: 0, name: Quadro P5000, pci bus id: 0000:02:00.0, compute
> capability: 6.1" ]
Solution 11 - Python
Tensorflow gpu 2.2 and 2.3 nightly
(along CUDA Toolkit 11.0 RC)
To solve the same issue as OP, I just had to find cudart64_101.dll on my disk (in my case C:\Program Files\NVIDIA Corporation\NvStreamSrv) and add it as variable environment (that is add value C:\Program Files\NVIDIA\Corporation\NvStreamSrv)cudart64_101.dll to user's environment variable Path).
Solution 12 - Python
download CUDA Toolkit 11.0 RC
To solve the issue, I just find cudart64_101.dll on my disk ( C:\Program Files\NVIDIA Corporation\NvStreamSrv) and add it as variable environment that is add value (C:\Program Files\NVIDIA\Corporation\NvStreamSrv)cudart64_101.dll to user's environment variable Path).
Solution 13 - Python
Was able to fix the issue by updating NVIDIA device drivers to the latest (v446.14). NVIDIA drivers download link here.
Solution 14 - Python
I ran into this problem when mixing pip & conda to get tensorflow 2.3 installed. (I used pip to install tensorflow 2.3 b/c at the time conda's install of tensorflow 2.3 was broken.)
I ended up with the incorrect versions of cudatoolkit and cudnn installed.
To solve the problem, I simply did conda install with specific versions of cudatoolkit and cuda specified.
Look at https://www.tensorflow.org/install/source_windows?force_isolation=true#tested_build_configurations for info on tensorflow, cudatoolkit, and cuda versions that should work together.
Solution 15 - Python
This could be caused by the version of python you are running as well, I was using the python 3.7 from the microsoft store and I run into this error, switching to python 3.10 fixed it.
Solution 16 - Python
A simpler way would be to create a link called cudart64_101.dll to point to cudart64_102.dll. This is not very orthodox but since TensorFlow is looking for cudart64_101.dll exported symbols and the nvidia folks are not amateurs, they would most likely not remove symbols from 101 to 102. It works, based on this assumption (mileage may vary).