# Error Catalogs

You can use existing error catalogs or develop your own.

To use an existing error catalog:

1. Find a defect in the list
2. Ask whether the software under test could have this defect
3. If it's theoritically possible the program could have the defect, ask how you could find the bug
4. Ask how plausible it is that the bug could be in the program and then how serious the failure would be if it was there
5. If appropropriate design a test or series of tests for bugs of this type

## Software Error Catalogs:

* [Common Software Errors from TCS, 1993](http://www.testingeducation.org/BBST/testdesign/Kaner_Common_Software_Errors.pdf)

## Security Catalogs:

* [National Vulnerability Database](https://nvd.nist.gov/)
* [Common Weakness Enumeration](https://nvd.nist.gov/vuln/categories)


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://guides.kenst.com/errors.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.