Excel 2016 crashes when calculating user-defined XLL functions after a macro button was used in an already closed workbook

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Important: This issue is now closed with the fix indicated below. For more information on other recent issues for your application, see Fixes or workarounds for recent Office issues.

Last Updated: December 13, 2017


If you use a button in a worksheet to start a macro and later close this workbook, subsequent attempts to calculate user-defined functions provided by an XLL add-in might crash. This impacts Monthly Version 1608 (Build 7301.xxxx).


This issue is fixed in Monthly Version 1708 (8431.2017) or higher. To get the latest updated immediately, open any Office 2016 app and choose File > Account > Update Options > Update Now.

For MSI based installations, use the latest patch for Excel that is available through Microsoft Update. For more information, see Office Updates.

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