Expressions common issues

Here are some common errors and issues related to expressions and steps to resolve or troubleshoot them.

The 'JSON Output' in item 0 contains invalid JSON

This error occurs when you use JSON mode but don't provide a valid JSON object. Depending on the problem with the JSON object, the error sometimes display as The 'JSON Output' in item 0 does not contain a valid JSON object.

To resolve this, make sure that the code you provide is valid JSON:

• Check the JSON with a JSON validator.
• Check that your JSON object doesn't reference undefined input data. This may occur if the incoming data doesn't always include the same fields.

Can't get data for expression