> 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/knowledge-base-articles/generic/downloaded-file-can-be-accessed-by-anyone-1.md).

# Send Function Keys Action is Failing

**Summary**: This article describes an issue where **Send Function Keys** fails when you provide an unsupported input.

### Error behaviour

When this issue occurs, you can observe the following behaviour: 

* The dynamic variable returns **False**. 
* The function key or key combination is not applied to the target element. 
* Depending on error-handling configuration, the test execution may stop at the **Send Function Keys** step, and subsequent steps may not execute.  

### **Possible Reasons**

This issue may occur due to one or more of the following reasons: 

* The **Input Value** does not match any supported function key name (typing error or unsupported key name used). 
* A non-numeric, zero, or negative value is provided after the semicolon (**;**) separator for \<number>. For example: ctrl+c;zero, ctrl+c;-2.&#x20;
* Function Keys in a combination are not joined using plus (**+**). For example: ctrl and c.&#x20;
* The specified key is unsupported by the Operating System (OS), browser, or application in the current context.&#x20;

### Resolution/Solution

To resolve this issue and ensure successful execution, perform the following actions:&#x20;

1. Refer to the List of Function Keys and List of Key Combinations tables and enter the exact function key as the Input Value.&#x20;
2. Cross-check spelling of function key before re-running the step.&#x20;
3. Provide a valid positive integer (1 or greater) after the ; separator, or skip \<number> to default to 1. For example: ctrl+c;2, ctrl+c. &#x20;
4. Join combination keys using + with no spaces. For example. ctrl+c, not ctrl c or ctrl,c.&#x20;
5. Verify that the target OS, browser, or application supports the specified key before use. &#x20;
6. If the function key is blocked or unsupported, use an alternate supported key or a different action.&#x20;


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