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Peltier Tech Charts for Excel 3.0 - Documentation

Known Issues: Add-In Disappears from Excel


The tab for an installed add-in does not appear in Excel's ribbon, but the add-in is checked in the Add-Ins dialog.


A Microsoft Office Update for July 2016 causes Excel to block files which were created on another computer, due to potential security concerns. The add-in will load successfully when it is installed, but when Excel is later restarted, it will not load the blocked file.

Note that this can occur for any third-party add-ins, not just Peltier Tech's.

Solution: Unblock the Add-In Workbook

Unblock Add-In Workbook

Remember, if you receive an updated add-in workbook, you must unblock the updated workbook before it will open.

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