How to Fix Excel Cannot Save Changes to XLA Add-Ins
Question details
Users are unable to save VBA code modifications made to an Excel .xla add-in, despite the file being writable and in a trusted location.

- Product
- Microsoft Excel
- Device & OS
- not provided
- Scenario
- Editing and attempting to save VBA changes within an existing .xla add-in file.
- Observed behavior
- Excel fails to retain the VBA changes upon saving, discarding the edits made to the add-in.
Ensure the .xla file is not marked as read-only in its Windows Properties and verify that it is stored in a designated Trusted Location in Excel's Trust Center.
Modify the IsAddin Property Before Saving
The most effective way to force Excel to save changes to an .xla file is to temporarily disable the Add-in status while editing.
Launch Excel and press ALT + F11 on your keyboard to open the Visual Basic for Applications (VBA) Editor.
In the Project Explorer pane on the left, locate and select the workbook corresponding to your .xla add-in.
In the Properties window below the Project Explorer (press F4 if it is hidden), find the 'IsAddin' property and change its value to 'False'.
Make your necessary modifications to the VBA code. Click the Save icon or press CTRL + S to save the workbook.
Change the 'IsAddin' property back to 'True', then save the file again to ensure it remains in the correct add-in format.

Repair the Microsoft 365 Installation
If changing the IsAddin property does not work, a corrupted Office installation might be preventing the save operation from executing properly.
Switch to WPS Office for Reliable Spreadsheet Management
If Microsoft Excel continues to experience issues with saving add-ins or requires constant repairs, consider switching to WPS Office. It provides a lightweight, highly compatible alternative for handling your spreadsheets and daily office tasks.

Frequently Asked Questions
Why does Excel revert changes made to my XLA file?
Excel sometimes fails to register VBA changes in add-in mode due to security restrictions or file status. Temporarily changing the workbook's 'IsAddin' property to False allows the changes to be written directly to the file.
How do I check if my add-in is blocked by security settings?
Right-click the .xla file in Windows File Explorer, select Properties, and look for a security warning at the bottom of the General tab. If present, check the 'Unblock' box and click Apply.
Can I use XLAM instead of XLA for Excel macros?
Yes, .xlam is the modern add-in format introduced in Excel 2007. It is based on the Open XML standard and is generally more stable and secure than the older binary .xla format.
What should I do if my organization manages my Office updates?
If you cannot run an Online Repair or update Office because your system is managed via the Microsoft Company Portal, you will need to contact your IT administrator to perform the repair or push the latest software updates.




