Pre-installation preparations

Install Python 2.7.x and pip

  • Linux – likely to be installed already
  • Windows – instructions and downloads are available at

Add Python and the scripts folder to the path

Windows only – this is usually automatic in linux

During the Windows Python 2.7 installation, ‘install’ Add Python.exe to Path:

Add Python to Path image

Python installation customisation dialogue

If Python is already installed, you can add Python to Path yourself:

Add the following to the end of the path environment variable (to see how to edit the environment variables, see


Setuptools and pip

Install setuptools and pip – for details go to The quick version is as follows:


Download the latest version using the same method as for Windows, or get the version in your package manager, for example:

sudo apt-get install python-pip


Pip is normally installed with Python. If it hasn’t been, download the installer script and save it locally – right click and Save link as... or equivalent.

Open a command window (Start menu, cmd.exe) and navigate to the place you saved the get‑ file:


Quick check of python and pip

To check everything is installed correctly so far, type the following in a command window/shell. You should have the version number of pip returned to you:

pip -V

Install RabbitMQ

For either install, just follow the defaults – no special configurations required.


Before continuing, consider virtualenv

Install NumPy

Numpy is required for charts. OpenREM will work without NumPy, but charts will not be displayed.

For linux:

sudo apt-get install python-numpy
# If using a virtualenv, you might need to also do:
pip install numpy

For Windows:

Download NumPy from

  • Find the right version - look for numpy-x.xx.x+mkl-cp27-cp27m-win32.whl for 32-bit Windows or
  • numpy-x.xx.x+mkl-cp27-cp27m-win_amd64.whl for 64-bit Windows.
  • At the time of writing, x.xx.x was 1.11.0 - choose the latest version
  • Install using pip:
pip install numpy‑1.11.0+mkl‑cp27-cp27m‑win32.whl
# or
pip install numpy‑1.11.0+mkl‑cp27‑cp27m‑win_amd64.whl
# changing the filename appropriately

Install pynetdicom (edited version)

Pynetdicom is used for the DICOM Store SCP and Query Retrieve SCU functions. See DICOM Store and QR for details.

pip install

Install PostgreSQL database

For production use, you will need to install and configure a database. We strongly recommend PostgreSQL, but you can use any of the databases listed on the Django website such as MySQL, Oracle or MS SQL Server, with the limitations listed there. There is one additional limitation - the calculation of median values for charts in OpenREM is dependent on using PostgreSQL.

If this is your first time installing OpenREM and you just want to test it out, you can skip this step and make use of the in-built SQLite database. However, you should expect to start again when you move to a production grade database.

Install OpenREM

You are now ready to install OpenREM, so go to the Installing OpenREM docs.

Further instructions

Virtualenv and virtualenvwrapper

If the server is to be used for more than one python application, or you wish to be able to test different versions of OpenREM or do any development, it is highly recommended that you use virtualenv or maybe virtualenvwrapper

Virtualenv sets up an isolated python environment and is relatively easy to use.

If you do use virtualenv, all the paths referred to in the documentation will be changed to:

  • Linux: lib/python2.7/site-packages/openrem/
  • Windows: Lib\site-packages\openrem

In Windows, even when the virtualenv is activated you will need to call python and provide the full path to script in the Scripts folder. If you call the script (such as without prefixing it with python, the system wide Python will be used instead. This doesn’t apply to Linux, where once activated, the scripts can be called without a python prefix from anywhere.