# How to use the new (v1.05+) Unreal Insight version for Unreal 4 (4.27) project ?

**URL:** <https://forums.unrealengine.com/t/how-to-use-the-new-v1-05-unreal-insight-version-for-unreal-4-4-27-project/2025842>\
**Category:** Debugging, Optimization, & Profiling\
**Tags:** Unreal-Insights, Insights, unreal-engine, question\
**Created:** [September 18, 2024, 8:24am UTC](https://forums.unrealengine.com/t/how-to-use-the-new-v1-05-unreal-insight-version-for-unreal-4-4-27-project/2025842 "2024-09-18T08:24:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Petricchor](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Petricchor](https://forums.unrealengine.com/u/Petricchor)\
**Post date:** [September 18, 2024, 8:24am UTC](https://forums.unrealengine.com/t/how-to-use-the-new-v1-05-unreal-insight-version-for-unreal-4-4-27-project/2025842/1 "2024-09-18T08:24:31Z")

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I am working on a project developed with Unreal 4.27.2.  
The Unreal Insight V0.14 version that comes with the engine works fine.

However, I would like to try the new version (V1.05+) that comes with Unreal 5.  
I downloaded Unreal 5.4, opened the insight in it and started my development build.  
However, this does not seem to work. I think I have a connection but it doesn’t save anything or create a file.  
How can I get this to work?

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**Author:** ![IMDiafera](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@IMDiafera](https://forums.unrealengine.com/u/IMDiafera)\
**Post date:** [September 30, 2025, 11:16am UTC](https://forums.unrealengine.com/t/how-to-use-the-new-v1-05-unreal-insight-version-for-unreal-4-4-27-project/2025842/2 "2025-09-30T11:16:01Z")

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In UE 4.27, the trace server was part of UnrealInsights app and it was using port 1980 to receive the utrace stream from the game runtime. In UE 5.x, UnrealTraceServer.exe is a separate process (spawned automatically by Unreal Insights, but also by game client/server or by editor) and it uses port 1981 instead. So, to record a trace from a UE 4.27 runtime, you still need the old Unreal Insights or to use `-tracefile` command line argument or to use`-tracehost=localhost:1981`.

Once the trace is recorded, it is safe to be open in any newer version of UnrealInsights (i.e. from any UE 5.x).