> For the complete documentation index, see [llms.txt](https://docs.avoautomation.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.avoautomation.com/avo-assure/support-resources/troubleshooting-guides/resolving-the-null-check-action-issue.md).

# Resolving the Null Check Action Issue

| <p><strong>Null Check</strong> action is failing in the report due to invalid input variable or incorrect output syntax. </p><p> </p> | <ul><li>Invalid input variable  </li><li>Invalid syntax in the output section </li></ul> | <ul><li>Verify the input value and ensure valid variable names are used.  </li><li>In the output section, if the value 0 is used to mark the step as passed, ensure the correct output format is applied for the null check action. </li></ul> |
| ------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |


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