---
title: Release Notes - FIX Engine C++ - Version 4.13.0
description: Improvement - Add syncData flag to the Session flushSessionStorage - Remove precompiled headers stdafx.h from samples - Scramble Logon fields in all cases
---

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

# [Release Notes - FIX Engine C++ - Version 4.13.0](https://www.onixs.biz/release-notes/release-notes-fix-engine-c-version-4-13-0.html)

 Written by [Admin](https://www.onixs.biz/release-notes/author/admin) | Apr 28, 2025, 8:21:27 AM

## Improvement

- [[CPP-4757](https://support.onixs.biz/browse/CPP-4757)] - Add syncData flag to the Session::flushSessionStorage()
- [[CPP-4745](https://support.onixs.biz/browse/CPP-4745)] - Remove precompiled headers (`stdafx.h`) from samples
- [[CPP-4726](https://support.onixs.biz/browse/CPP-4726)] - Scramble Logon fields in all cases when it is logged to the FIX Engine log
- [[CPP-4721](https://support.onixs.biz/browse/CPP-4721)] - Migrate Typed Message Generator to .NET 9
- [[CPP-4709](https://support.onixs.biz/browse/CPP-4709)] - Get rid of the reconnecting thread for ThreadPool and ExternalThread (TcpStandard) threading models
- [[CPP-4689](https://support.onixs.biz/browse/CPP-4689)] - Optimize the message search during the Resend Request processing
- [[CPP-4670](https://support.onixs.biz/browse/CPP-4670)] - Use the empty session's mutex when the TCPStandard stack in the ExternalThread threading model is used

## New Feature

- [[CPP-4753](https://support.onixs.biz/browse/CPP-4753)] - BREAKING CHANGE: Add received data timestamp
- [[CPP-4692](https://support.onixs.biz/browse/CPP-4692)] - ResendingBatchSize configuration setting

## Task

- [[CPP-4731](https://support.onixs.biz/browse/CPP-4731)] - Add EP296
- [[CPP-4708](https://support.onixs.biz/browse/CPP-4708)] - Remove Windows 32-bit libraries from the distribution package

[View full post](https://www.onixs.biz/release-notes/release-notes-fix-engine-c-version-4-13-0.html)

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