> ## Documentation Index
> Fetch the complete documentation index at: https://docs.grunt.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Save and compatibility issues

> Check Office and Grunt architecture alignment when save errors or instability appear

If PowerPoint shows a save error while Grunt is installed, one possible cause is an architecture mismatch between Microsoft Office and the Grunt add-in.

## Why architecture matters

The current Grunt release ships as a 64-bit (`x64`) COM add-in, with an `arm64` variant for Windows on ARM. Grunt does not ship a 32-bit build. If your Office installation is 32-bit, the Grunt add-in will not load.

Symptoms of a mismatch include:

* Grunt tab missing
* Save failures
* Crashes or unexpected behavior

## Check your Office architecture

1. Open PowerPoint or another Office app.
2. Open **File**.
3. Choose **Account**.
4. Look under **Product Information** to confirm whether Office is `32-bit` or `64-bit`.

## Fix the mismatch

If Office is 32-bit, upgrade Office to 64-bit. Microsoft 365 installs are 64-bit by default. If your organization controls Office deployment, ask IT to switch to the 64-bit channel.

If you are on a Windows on ARM device, use the `arm64` Grunt installer from [app.grunt.pro/download](https://app.grunt.pro/download).

If your organization controls deployment centrally, ask IT to distribute the matching package.

## 32-bit Office support is being phased out

Grunt no longer publishes a 32-bit installer on the main download page. If your organization still runs 32-bit Office:

* Contact support for a direct link to the current stable 32-bit release
* Plan to upgrade to 64-bit Office — Microsoft 365 installs are 64-bit by default
* 32-bit support will be fully discontinued once the .NET 9 migration is complete

## Related pages

* Use [Get started](/powerpoint-add-in/user/get-started) for standard install guidance.
* Use [Deployment and installation](/powerpoint-add-in/it/deployment-and-installation) for managed deployment.