> For the complete documentation index, see [llms.txt](https://docs.icpc1hn.work/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.icpc1hn.work/2.-huong-dan-du-dung-app-icpc1hn/cuoc-hen-check-call/loi-check-call.md).

# Lỗi check call

<figure><img src="https://3851242760-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FQS7Vie8hMmEC6mnz4EH2%2Fuploads%2FeZC4sXzW3JQb2xMaDHYo%2Fimage.png?alt=media&amp;token=eb654f81-2479-42ff-96ba-38efd74ff800" alt=""><figcaption></figcaption></figure>

<figure><img src="https://3851242760-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FQS7Vie8hMmEC6mnz4EH2%2Fuploads%2FdWfK7qwT87IReAmTlGwH%2Fimage.png?alt=media&amp;token=f2b48018-64d5-4bb5-94b1-41690e7a7f65" alt=""><figcaption></figcaption></figure>