---
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
```