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OpenIntegrations/docs/en/md/TCP/Client-methods/Get-last-error.mdx
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---
sidebar_position: 8
description: Get last error and other functions to work with TCP in the Open Integration Package, a free open-source integration library for 1C:Enterprise 8, OneScript and CLI
keywords: [1C, 1С, 1С:Enterprise, 1С:Enterprise 8.3, API, Integration, Services, Exchange, OneScript, CLI, TCP]
---
import Tabs from '@theme/Tabs';
import TabItem from '@theme/TabItem';
# Get last error
Gets information about the last error in the connection
`Function GetLastError(Val Connection) Export`
| Parameter | CLI option | Type | Required | Description |
|-|-|-|-|-|
| Connection | - | Arbitrary | ✔ | Connection, see. CreateConnection |
Returns: Map Of KeyAndValue, Undefined - Error information or undefined if there is no error
<br/>
:::caution
**NOCLI:** this method is not available in CLI version
:::
<br/>
```bsl title="1C:Enterprise/OneScript code example"
Address = "45.79.112.203:4242";
Connection = OPI_TCP.CreateConnection(Address);
Data = "Hello server!" + Chars.LF;
Sending = OPI_TCP.SendLine(Connection, Data);
```
```json title="Result"
null
```