I'm using a Fixed Template Document AI Builder model inside Power Automate. The model works fine with PDFs when tested in AI Builder, but in Power Automate I consistently receive this error on the Predict step:
"Unsupported mime type Fixed layout"
The flow is built using:
- Trigger: When a new email arrives in a shared mailbox (V2)
- Creates file in SharePoint (PDF)
- Gets file metadata (returns MediaType: application/pdf)
- Predict action (Model selected, Document Type = Fixed layout, Document = body/Id from Get file metadata)
I’ve confirmed via Compose that the file is `application/pdf`, yet Predict fails saying it received `Fixed layout` as a MIME type. This suggests the layout label is being routed incorrectly into the document input.
Have already:
- Deleted/reinserted Predict step using AI Builder panel
- Verified correct field mapping
- Re-tested with multiple flows and files
Can Microsoft escalate this? This appears to be a backend AI Builder bug with schema binding.
Thanks in advance!
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