---
title: "E28043 — AMBTemplateVariableMissing"
description: "A required Apple Messages template variable is missing from parameters."
canonical: "https://bird.com/docs/api/errors/E28043"
---

# E28043 — AMBTemplateVariableMissing

A required Apple Messages template variable is missing from parameters.

- **HTTP status**: `422`
- **Type**: `validation_error`
- **Name**: `AMBTemplateVariableMissing`

## What to do

This template declares required variables that were not in parameters. Fetch the template to see its required variable keys, then add each missing one to parameters and resend.

Operations that resolve this:

- [Get an Apple Messages template](/docs/api/reference/get-amb-template)

## Related

- [E28xxx — Apple Messages for Business](/docs/api/errors/E28xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

[Get an implementation brief](/learn/workspace?topic=api-basics)