---
type: post-synth-check
title: WAW037
description: Null values in CFN resource properties — caused by invalid AttrRef (.PropName) usage
id: WAW037
severity: error
category: post-synth
lexicon: aws
docs: https://intentius.io/chant/lexicons/aws/rules/
---
Null values in CFN resource properties — caused by invalid AttrRef (.PropName) usage

## Applies to

- [Type](/types/Type.md)