# What to use the Add error metadata step for
This step's output is included in error messages from subsequent steps, aiding in debugging and testing data output.
You can use this step to:
- Test data ouput in steps
- Working out causes of errors in steps
- Enhance error messages
# How to configure the Add error metadata Step
Add this step to the start of your Axiom.
Build your custom error message here. Use 'Insert Data' to select tokens to display data you wish to check from steps in your Axiom.
# Additional information
You may want to try our 'Try catch' step to aid debugging.