Fixing `Runtime Error '91': Object Variable or With Block Variable Not Set in VBA For Loops

Learn how to troubleshoot and fix Runtime Error '91' in VBA when using For Loops, ensuring your code runs smoothly and efficiently.
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Troubleshooting VBA: Resolving Runtime Error '91'

When working with VBA (Visual Basic for Applications) in Excel, you might encounter various runtime errors that can disrupt your workflow. One common error is Runtime Error '91': Object variable or With block variable not set. This error often appears when the code attempts to use an object variable that has not been assigned a reference.

In this guide, we will explore this specific error, understand why it occurs within a For Loop, and provide practical solutions to ensure your code runs without interruptions.

The Problem: Understanding Runtime Error '91'

You may be rearranging data in your Excel sheets, and suddenly, while executing a loop, you face the dreaded Runtime Error '91'. This often occurs in code similar to the following:

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In the scenario provided, the error arises at the line For i = 2 To 73, indicating that your sht1 worksheet variable has not been properly set up.

Breaking Down the Solution

To resolve this issue, let’s analyze the critical elements needing adjustment or addition in your VBA code. Here’s a step-by-step solution:

1. Declaring and Setting the Worksheet Variable

Before using your worksheet variable, you must define and set it correctly. Use the Set statement to assign sht1 to a specific worksheet:

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2. Using the With Block

Using a With block can streamline your code, reducing redundancy and improving clarity. It allows you to refer to the object with less typing. Here’s how you can implement it:

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

3. Avoiding Unnecessary Declarations

Although not always necessary, cleaning up your variables can enhance readability and performance. For instance, you can remove unnecessary initializations:

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

4. Storing Values Efficiently

If a certain value needs to be evaluated multiple times, consider storing it in a variable to avoid repetitive calculations. Here’s an example where we store the value of Range("Y" & i).Value2:

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Putting It All Together

Here is the revised version of the complete code that addresses the original error:

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Conclusion

Encountering errors like Runtime Error '91' in VBA can be frustrating, but with a better understanding of object variables and With blocks, you can write cleaner and more efficient code. By following the outlined strategies in this guide, you'll be able to overcome similar errors, leading to a smoother Excel automation experience.

If you found this post helpful, feel free to share your thoughts or ask questions in the comments below!

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