OpenSolver is updated whenever new features are added or bugs fixed. Please check out the blog page for release details.
OpenSolver runs as an Excel add-in file, OpenSolver.xlam. OpenSolver also requires the COIN-OR CBC optimization engine files; these are included in the download. On Windows, OpenSolver should work with Excel 2007 and later; we test it on 64 bit Windows in Excel 2010 and 2013. (Older versions worked with Excel 2003, but we don’t test this any more.) On Mac OSX, it should work using Excel for Mac 2011.
To use OpenSolver:
- Download the OpenSolver zip file (which is hosted on our Open Solver Source Forge site). You can also try out our experimental release (Windows or Mac) for access to non-linear solvers (more info here)
- Extract the files to a convenient location. (All files and sub-folders, including OpenSolver.xlam, must stay together; please do not move any files or folders out of the unzipped OpenSolver folder.) OpenSolver on Windows may not work if installed to an unmapped directory such as \\server\myfiles\
- Double click on OpenSolver.xlam. There may then be a small wait as Excel checks the digital signature on the OpenSolver code.
- If asked in an Excel Security Notice, give Excel permissions to enable the OpenSolver macros. You can click Trust all from Publisher if you do not want to be shown the Excel Security Notice again.
- The OpenSolver commands will then appear under Excel’s Data tab on Windows, or in the Menu Bar on a Mac.
Note that as of October 2014, the OpenSolver code is signed by the publisher “The University of Auckland”. This makes the code more secure. However, Excel will occasionally need to check the digital signature, which can take a few seconds.
OpenSolver will be available until you quit Excel. If you wish, there are two ways you can make OpenSolver permanently available in Excel. Either, use OpenSolver… About OpenSolver…. and check “Load OpenSolver when Excel starts”. Alternatively, you can copy the files from the .zip into the Excel add-in directory. This is typically:
C:\Documents and Settings\"user name"\Application Data\Microsoft\Addins
Windows Vista and later (7, 8, 8.1):
/Applications/Microsoft Office 2011/Office/Add-Ins
The Excel Solver is a product developed by Frontline Systems for Microsoft. OpenSolver has no affiliation with, nor is recommended by, Microsoft or Frontline Systems. All trademark terms are the property of their respective owners.