# Install Troubleshooting¶

Note

Most installation issues can be fixed by upgrading some packages and then rerunning the FiftyOne install. So, try this first before reading on:

pip install --upgrade pip setuptools wheel
pip install fiftyone


## Python/pip incompatibilities¶

### “No matching distribution found”¶

If you attempt to install FiftyOne with a version of Python or pip that is too old, you may encounter errors like these:

ERROR: Could not find a version that satisfies the requirement fiftyone (from versions: none)
ERROR: No matching distribution found for fiftyone

Could not find a version that satisfies the requirement fiftyone-brain (from versions: )
No matching distribution found for fiftyone-brain

fiftyone requires Python '>=3.6' but the running Python is 3.4.10


To resolve this, you will need to use Python 3.6 or newer, and pip 19.3 or newer. See the installation guide for details. If you have installed a suitable version of Python in a virtual environment and still encounter this error, ensure that the virtual environment is activated. See the virtual environment setup guide for more details.

### “Package ‘fiftyone’ requires a different Python”¶

This error occurs when attempting to install FiftyOne with an unsupported Python version (either too old or too new). See the installation guide for details on which versions of Python are supported by FiftyOne.

If you have multiple Python installations, you may be using pip from an incompatible Python installation. Run pip --version to see which Python version pip is using. If you see an unsupported or unexpected Python version reported, there are several possible causes, including:

• You may not have activated a virtual environment in your current shell. Refer to the virtual environment setup guide for details.

• If you are intentionally using your system Python installation instead of a virtual environment, your system-wide pip may use an unsupported Python version. For instance, on some Linux systems, pip uses Python 2, and pip3 uses Python 3. If this is the case, try installing FiftyOne with pip3 instead of pip.

• You may not have a compatible Python version installed. See the installation guide for details.

### “No module named skbuild”¶

On Linux, this error can occur when attempting to install OpenCV with an old pip version. To fix this, upgrade pip. See the installation guide for instructions, or the opencv-python FAQ for more details.

## Videos do not load in the App¶

You will need to install FFmpeg in order to work with video datasets:

sudo apt install -y ffmpeg

brew install ffmpeg


## IPython installation¶

If you are using IPython and a virtual environment for FiftyOne, IPython must be installed in the virtual environment, per the installation guide. If you attempt to use a system-wide IPython installation in a virtual environment with FiftyOne, you may encounter errors such as:

.../IPython/core/interactiveshell.py:935: UserWarning: Attempting to work in a virtualenv. If you encounter problems, please install IPython inside the virtualenv.

File ".../fiftyone/core/../_service_main.py", line 29, in <module>
import psutil
ModuleNotFoundError: No module named 'psutil'

ServerSelectionTimeoutError: localhost:27017: [Errno 111] Connection refused


To resolve this, install IPython in your active virtual environment (see the virtual environment guide for more information):

pip install ipython


## MongoDB compatibility issues on Linux¶

The fiftyone-db package includes a build of MongoDB that works on Ubuntu 18.04 and several other modern distributions. If this build does not work on your distribution, you may encounter an error similar to:

/usr/local/lib/python3.6/dist-packages/fiftyone/db/bin/mongod: failed to launch:
libcrypto.so.1.1: cannot open shared object file: No such file or directory

RuntimeError: Could not find mongod >= 4.4


To resolve this, you can install an alternative package on some distributions, detailed below, or install a compatible version of MongoDB system-wide.

### Alternative builds¶

Alternative builds of MongoDB are available as pip packages for the distributions listed below, and can be installed by running the corresponding command. Note that these packages must be installed after the fiftyone package; if you install fiftyone afterwards, you can fix your MongoDB installation by adding --force-reinstall to the commands below.

# be sure you have libcurl3 installed
# apt install libcurl3
pip install fiftyone-db-ubuntu1604

pip install fiftyone-db-debian9

pip install fiftyone-db-rhel7


### Manual installation¶

FiftyOne also supports using an existing MongoDB installation (version 4.4 or newer). This can be installed through many distributions’ package managers. Note that only the mongod (server) binary is required, so you may not need the complete MongoDB package. For example, Debian-based distributions make this available in the mongodb-server package.

If your distribution does not provide a new-enough version of MongoDB, or if you would like to install a newer version, see the MongoDB documentation for instructions on installing MongoDB on your distribution. Note that you only need the mongodb-org-server package in this case.

To verify the version of your MongoDB installation, run mongod --version, which should produce output that looks like this:

db version v4.2.6
git version: 20364840b8f1af16917e4c23c1b5f5efd8b352f8
OpenSSL version: OpenSSL 1.1.1  11 Sep 2018
allocator: tcmalloc
modules: none
build environment:
distmod: ubuntu1804
distarch: x86_64
target_arch: x86_64


Verify that the version after “db version” is at least 4.4.