Скачать или смотреть Solving Run Time Error 13: Type Mismatch When Parsing JSON with JSONConverter in Excel VBA

Learn how to troubleshoot and fix the `Run Time Error 13: Type Mismatch` issue when parsing JSON using JSONConverter in Excel VBA. Follow our step-by-step guide for effective solutions.
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Understanding and Fixing Run Time Error 13: Type Mismatch in Excel VBA while Parsing JSON

When working with JSON data in Excel VBA using the JSONConverter library, encountering errors can be a common hurdle. One particularly frustrating error is the Run Time Error 13: Type Mismatch. This issue often arises when trying to extract values from a JSON object, such as the customfield_10101, but the way you're calling the values might not match the data structure of your JSON response.

In this guide, we’ll break down the problem, analyze the underlying cause, and provide a step-by-step solution to help you overcome this error effectively.

Understanding the Problem

You are attempting to parse a JSON response and extract values from the customfield_10101 field, but you encounter a type mismatch error when running the line of code where you try to assign a value to the tempName variable. Let’s look at the code that causes the error:

[[See Video to Reveal this Text or Code Snippet]]

Breakdown of the Error

The Run Time Error 13 occurs in the last line of your code.

This typically indicates that the data you are trying to access does not exist or the structure you are using to access it is incorrect.

Solution: How to Fix the Type Mismatch Error

1. Ensure Proper Reference to JSON Response

The first thing you need to check is whether you are correctly retrieving the JSON response. If you are fetching this JSON from an HTTP request, your reference to responseText should be made clear. Here’s how to properly retrieve the JSON data in two scenarios:

If You Are Making an HTTP Request

If your JSON response is coming from a web request stored in a request object (let’s call it req), your code should look like this:

[[See Video to Reveal this Text or Code Snippet]]

Or if you are using a With-End With block, it will be structured as:

[[See Video to Reveal this Text or Code Snippet]]

2. If You Are Storing JSON as a String

If your JSON structure is stored directly as a string, such as within a cell in Excel, ensure you reference it correctly:

[[See Video to Reveal this Text or Code Snippet]]

3. Verify JSON Structure

Another vital aspect to verifying the solution is to ensure that the structure of your JSON when parsed matches what you’re trying to access. In JSON, arrays are zero-indexed, meaning the first element is at position 0, not 1. This might also lead to mismatches in your element access:

For example, if you want to access the first issue's customfield_10101, you should modify your access to:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By ensuring appropriate string references and correctly accessing elements based on your JSON structure, you can effectively resolve the Run Time Error 13: Type Mismatch. Once you've made these adjustments, your VBA code should run smoothly, letting you extract the desired information without a hitch.

Don’t let JSON parsing errors bog you down; applying these troubleshooting tips will enhance your productivity in Excel VBA! Happy coding!