---
title: Release Notes - C++ FIX Engine - Version 3.3.0.0
description: Release Notes - C++ FIX Engine - Version 3.3.0.0
---

[Release Notes ](https://www.onixs.biz/release-notes)

# [Release Notes - C++ FIX Engine - Version 3.3.0.0](https://www.onixs.biz/release-notes/release-notes-c-fix-engine-version-3-3-0-0.html)

 Written by [Admin](https://www.onixs.biz/release-notes/author/admin) | Mar 1, 2013, 12:00:00 AM

## Improvement

- [[CPP-704](http://support.onixs.biz/browse/CPP-704)] - Improve Data fields deserialization error messages.
- [[CPP-719](http://support.onixs.biz/browse/CPP-719)] - Message.Validate() should also validate user-defined fields
- [[CPP-725](http://support.onixs.biz/browse/CPP-725)] - Decrease session startup time
- [[CPP-759](http://support.onixs.biz/browse/CPP-759)] - All Engine threads should be named

## New Feature

- [[CPP-722](http://support.onixs.biz/browse/CPP-722)] - Add optional NextExpectedMsgSeqNum field (tag 789) support in Logon message

[View full post](https://www.onixs.biz/release-notes/release-notes-c-fix-engine-version-3-3-0-0.html)

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