---
title: "MetaTrader 5 Client Terminal build 238 - Release Notes"
description: "MQL5: Fixed the debugger error causing crashes when class members with an access via 'this' are displayed in 'watch'. - Release Notes"
image: "https://www.metatrader5.com/i/logo_metatrader5.png"
url: "https://www.metatrader5.com/en/releasenotes/terminal/238"
---

# MetaTrader 5 Client Terminal build 238

## MQL5: Fixed the debugger error causing crashes when class members with an access via 'this' are displayed in 'watch'

14 January 2010

1. MQL5: Fixed the debugger error causing crashes when class members with an access via 'this' are displayed in 'watch'.
2. MQL5: Added optimization of string parameters (removing redundant copying).
3. MQL5: Fixed errors reported in crash logs and bug reports.

**Earlier publications:**

- [MetaTrader 5 Client Terminal build 237](https://www.metatrader5.com/en/releasenotes/terminal/33)
- [MetaTrader 5 Client Terminal build 235](https://www.metatrader5.com/en/releasenotes/terminal/235)
- [MetaTrader 5 Client Terminal build 234](https://www.metatrader5.com/en/releasenotes/terminal/234)
- [MetaTrader 5 Client Terminal build 233](https://www.metatrader5.com/en/releasenotes/terminal/233)
- [MetaTrader 5 Client Terminal build 230](https://www.metatrader5.com/en/releasenotes/terminal/230)