---
title: "Error Message: 'No Metadata Class Defined for Data Contract Object'"
slug: "error-no-metadata-class-defined-for-data-contract-object"
description: "This article provides a solution for the following error that maybe appear in AX 2012: 'No metadata class defined for data contract object'."
tags: ["Error message", "Metadata", "Lasernet Connector ", "AX2012"]
updated: 2025-03-27T10:56:12Z
published: 2025-03-27T10:56:12Z
canonical: "kb.lasernetgroup.com/error-no-metadata-class-defined-for-data-contract-object"
---

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

# Error Message: 'No Metadata Class Defined for Data Contract Object'

This article provides a solution for the following error that maybe appear in AX 2012:

> [!CAUTION]
> Error
> 
> No metadata class defined for data contract object.

![](https://cdn.document360.io/c831ef63-c6b3-48ee-b443-3e33644e4e2e/Images/Documentation/image-H1ITY7UR.png)

This error is caused by custom code and occurs after an upgrade from an older Lasernet Connector version to 4.2.x.x.

### Resolution

To correct this, go through all your **LACCustomCode** one by one and change the code according to the following image. This is an example from an older Lasernet Connector version and version 4.2.x.x:

![](https://cdn.document360.io/c831ef63-c6b3-48ee-b443-3e33644e4e2e/Images/Documentation/image-9VVD744U.png)