Home → Troubleshooting → @RISK for Excel: Simulation → Simulation Used to Run, Now Crashes Excel
Applies to: @RISK 6.1, 6.2, 6.3, 7.0 in 32-bit Excel 2013 or 2016
My simulation used to run okay, but now the same file crashes Excel during simulation.
If you're running 64-bit Excel, or Excel 2010 or earlier, this article does not apply to you. (Which Version of Excel Am I Running? guides you to find your Excel version and whether it's 32-bit or 64-bit; the same screen should show you the build number.)
In June 2016, Microsoft updated 32-bit Excel 2013 and 2016 to make them "large address aware". (For more about the update, see the starred note at the end of Should I Install 64-bit Excel?) @RISK 7.0 and earlier cannot run large simulations correctly with this update in place.
To see if you have the update, check your Excel build number. If your build number in Excel 2013 is 15.0.4833.1000 or higher, or your build number in Excel 2016 is 16.0.4390.1000 or higher, then you have the update. In that case you should upgrade your @RISK or DecisionTools Suite to our latest version, which has new programming to accommodate this change by Microsoft. If you have a lower build than those, then something else is the cause; see "Out of Memory" for a starting point.
Last edited: 2016-08-12