---
title: "Client skill error troubleshooting (4xx)"
slug: "clovastudio-troubleshoot-s4xx"
updated: 2026-09-17T09:35:47Z
published: 2026-09-17T09:35:47Z
canonical: "api.ncloud-docs.com/clovastudio-troubleshoot-s4xx"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Client skill error troubleshooting (4xx)

Available in Classic and VPC

You might run into the following problems when using CLOVA Studio. Find out causes and possible solutions.

| HTTP status code | Code | Message | Causes | Solution |
| --- | --- | --- | --- | --- |
| 400 | `61002` | `Missing input value` | Input value missing | Check for missing or incorrect user queries. |
| 400 | `61004` | `Invalid action input` | API call failure | Edit and train the data to generate the correct action input value, then call again. Check that the API response time does not exceed 30 seconds. |
| 400 | `61005` | `Missing model url` | Model path missing | Contact the inquiry channel. |
| 400 | `62001` | `Invalid input value` | Query analysis failure | Try again with a user query suitable for the skill set or edit the Description for model value |
| 400 | `63001` | `Invalid action in cot` | Skill call failure | Try again with a user query associated with the skillset |
| 400 | `63002` | `Requests_* action not in cot` | API call missing | Try again with a user query associated with the skillset |
| 400 | `64400` | `{HyperCLOVA error message}` | Token count exceeded | Reduce the length of the entered text so that it doesn't exceed the number of tokens the model can process, or use the API spec extension feature to reduce the API response and then request. |
| 400 | `65001` | `Invalid labels detected` | Router model creation error | Change the domain and filter names, or try again with a different query. |
| 400 | `65400` | `{HyperCLOVA error message}` | Route token count exceeded | Reduce the length of the input text (user input, domain description, filter description, etc.) so that it does not exceed the maximum token count, then request again. |
| 429 | `64429` | `{HyperCLOVA error message}` | Request count exceeded | Control the request or try again to avoid exceeding the maximum usage limit. |

              Note

              

Configuring your system to reference HTTP status codes helps ensure reliable operation.