Extend App Fails to Download on Windows After Being Deployed From Mac
The error Unable to fetch app(s)
Unknown file type: .metainfo
What it means
An app was packaged and deployed to App Hub from a Mac. Trying to download that same app to a Windows machine fails with an unrecognized-file-type error on a .metainfo file, even though the app deployed successfully in the first place.
Troubleshooting
- Confirm the app was originally packaged and pushed to App Hub from a Mac IDE. Cross-platform metadata handling differences between the Mac and Windows App Console client are the likely trigger.
- Check whether other apps packaged from a Windows machine download fine on Windows, this isolates the problem to the packaging platform rather than the receiving machine or the tenant.
- Inspect the app package contents (or re-export it) for a .metainfo file, and compare its format against a package built natively on Windows.
- If the issue is reproducible, open a support case referencing the specific .metainfo file type, since the underlying fix is on Workday's App Console client, not something the app developer can patch directly.
⚡ Quick fix
Re-package and re-deploy the app from a Windows machine so the .metainfo file is generated in a format the Windows App Console client recognizes.
✓ Permanent fix
Standardize on packaging and deploying each app from the same OS across your team, or confirm with Workday support that the App Console client version in use has resolved cross-platform .metainfo compatibility before relying on mixed-OS workflows.
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