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

# Malformed Appointment Opening Offer

> The regular opening offer identifier has an invalid wire shape

## Cause

The supplied regular opening offer identifier is empty, too long, or cannot be decoded as an opening offer. The appointment was not created.

## Fix

Discard the value, list openings again with the selected service identifiers, and create the appointment with the unmodified `offerId` from the new response.

## Retry safety

Not retryable until the request carries a well-formed opening offer.

## Raised by

This operation can return this problem:

* [Create an appointment](/api-reference/appointments/create-an-appointment)

## Example

```json theme={null}
{
  "type": "https://docs.guile.app/problems/malformedAppointmentOpeningOffer",
  "title": "Malformed Appointment Opening Offer",
  "status": 400,
  "detail": "The regular opening offer identifier has an invalid wire shape."
}
```