---
title: "MetaTrader 5 Client Terminal build 249 - 更新历史"
description: "发布说明: MQL5: Fixed an error in the access to a selected position. MQL5: Fixed an error in passing of NULL as a string parameter to a... - 更新历史"
image: "https://www.metatrader5.com/i/logo_metatrader5.png"
url: "https://www.metatrader5.com/zh/releasenotes/terminal/249"
---

# MetaTrader 5 Client Terminal build 249

## 发布说明: MQL5: Fixed an error in the access to a selected position. MQL5: Fixed an error in passing of NULL as a string parameter to a system call

19 二月 2010

1. MQL5: Fixed an error in the access to a selected position.
2. MQL5: Fixed an error in passing of NULL as a string parameter to a system call.
3. MQL5: The definition of the fifth parameter (parameters_array[]) of the IndicatorCreate() function has changed - now it's a constant parameter.

**请参阅前面的新闻：**

- [MetaTrader 5 Client Terminal build 248](https://www.metatrader5.com/zh/releasenotes/terminal/248)
- [MetaTrader 5 Client Terminal builds 247](https://www.metatrader5.com/zh/releasenotes/terminal/247)
- [MetaTrader 5 Client Terminal builds 246](https://www.metatrader5.com/zh/releasenotes/terminal/246)
- [MetaTrader 5 客户终端 build 245](https://www.metatrader5.com/zh/releasenotes/terminal/245)
- [MetaTrader 5 客户终端 build 242](https://www.metatrader5.com/zh/releasenotes/terminal/242)