The following versions of EwE are available for download (see the EwE change log):

EwE 6.6 (December 2019)

EwE 6.6 is finally out in preparation for the EwE35 Years Conference. Click here to see what’s new

EwE 6.5 (July 2016)

EwE 6.5 has gained a range of new features, such as:


  • Integration with EcoBase model repository
  • Pre-bal diagnostics
  • Ecological indicators (also available to Ecosim, Ecospace, and Monte Carlo)
  • Taxonomy search support for World Register of Marine Species
  • Valls et al keystone indicator


  • Support for monthly time series, relative catch time series
  • Shannon diversity index
  • Monte Carlo diet, catch, and landings perturbation
  • Sharing of functional responses with Ecospace, ability to use any number of environmental drivers


  • Exclusion layer to exclude cells from computations
  • Overlapping MPAs
  • Improved auto-saving, including saving of map images
  • Per-group capacity model settings (habitat, env responses, or both)

This release includes bug fixes. For a detailed list please see the EwE 6.5 release notes.

Beta testing and the release of EwE version 6.5 was made possible through funding from the following Ecopath Research and Development Consortium partners and aspiring members:

  • Global Ocean Modeling Unit, Institute for the Oceans and Fisheries, UBC (Canada)
  • Institute for Research and Development (France)
  • Kinneret Limnological Laboratory, Migdal (Israel)
  • The Potomac Environmental Research and Education Center, George Mason University (USA)
  • The Scottish Association for Marine Science (UK)
  • Theoretical Ecology and Modelling. Leibniz Center for Tropical Marine Ecology (Germany)
  • University of Santiago de Compostela (Spain)

Additional downloads

EwE 6.4.4 (August 2015)

EwE 6.4.3 (October 2014)

EwE 6.4.2 (July 2014)

EwE 6.4.1 (March 2014)

EwE 6.4 (October 2013)

Ecopath 5.1 (2005)

This is the last version of Ecopath 5, prior to the overhaul to .NET and the subsequent releases of EwE 6. Ecopath 5 contains a few features that were not migrated to EwE 6 for various reasons; you might want to use this version if you need access to legacy features such as EcoRanger and the auto mass-balance routine. It is recommended to install Ecopath 5 on Windows XP. You might need to install a virtual PC environment.

This version will complain that it is outdated on launch. Just enter ‘Polovina’ in the panic box and Ecopath 5 will start.

Please note that we are no longer making changes to the Ecopath 5 source code; Ecopath version 5 is no longer being maintained.

Installation notes

EwE 6.6 requires Windows 7 or newer, .NET Framework 4.5, Microsoft Access 2007 or newer, or Access database components 2016 or newer. Due to technology creep on Microsoft’s behalf, we can no longer ensure that EwE software runs well on Windows Vista or older.

EwE 6.5 and older require Windows XP SP 3 or newer, .NET Full Framework 4.0 (not .NET Client Framework), Microsoft Access 2007 or 2010, or Access database components 2007 or 2010.

Note for users of Windows 8 or newer

If you receive a Windows Smart Screen notification while trying to install or execute EwE such as

Windows protected your PC
Windows SmartScreen prevented an unrecognized app from starting, Running this app might put your PC at risk.

then simply click the “More info” link under the warning, and click “Run Anyway”. Anti-virus solutions such as Microsoft SmartScreen and Avast will start trusting software the more it gets installed.

Other downloads