---
page_type: error
code: 54251
message: "54251: Invalid Message Stream Message data"
level: ERROR
product: Sync
---

## Error - 54251

### Sync: Invalid Stream Message data

The 'Data' parameter cannot be null.

#### Possible Causes

- Your request does not include a Data parameter which is required for this operation.

#### Possible Solutions

Confirm that a valid Data parameter containing a serialized, utf-8 JSON object is being passed in your request.