Call unknown Function Error ! (aqProf.dll related and selffixed)

i’ve checked carefully logs. The one difference in logs before and after bug is this:

LogWindows: Failed to load ‘aqProf.dll’ (GetLastError=126)
LogWindows: File ‘aqProf.dll’ does not exist
LogWindows: Failed to load ‘VtuneApi.dll’ (GetLastError=126)
LogWindows: File ‘VtuneApi.dll’ does not exist
LogWindows: Failed to load ‘VtuneApi32e.dll’ (GetLastError=126)
LogWindows: File ‘VtuneApi32e.dll’ does not exist

I gogled it and that are fortnite related bugs but in logs before my problem i dont have that entries.
Any idea what is hapening?

Ok i fix that ■■■■.

the reason for the problem was a brothel in the engine files.
After and check my logs and found that entries.

LogWindows: Failed to load 'aqProf.dll' (GetLastError=126)
LogWindows: File 'aqProf.dll' does not exist
LogWindows: Failed to load 'VtuneApi.dll' (GetLastError=126)
LogWindows: File 'VtuneApi.dll' does not exist
LogWindows: Failed to load 'VtuneApi32e.dll' (GetLastError=126)
LogWindows: File 'VtuneApi32e.dll' does not exist

I searched the internet to solve the problem and of course I did not find anything interesting, But some dude someday was facing problem with advanced rendering lights and his engine after that starts to drop libriaries.

Someone else advice him to Clear folder located here :

C:/Users/{system username}/AppData/Local/UnrealEngine

(Without any spaces, find folder exactly like i wrote)

Then i delete all contents of this folder. and rebuild VS files.

TaaaDaaaa! All works great right now.
I hope that my solution will be helpful to all who will face a similar problem in the future.

I searched the internet to solve the problem and of course I did not find anything interesting, But some dude someday was facing problem with advanced rendering lights and his engine after that starts to drop libriaries.

Someone else advice him to Clear folder located here :

C:/Users/{system username}/AppData/Local/UnrealEngine

(Without any spaces, find folder exactly like i wrote)

Then i delete all contents of this folder. and rebuild VS files.

TaaaDaaaa! All works great right now. I hope that my solution will be helpful to all who will face a similar problem in the future.

I had this problem and i managed to solve it. Yesterday everything was fine and today it just crashed when I tried to open the project. I removed folders one at a time untill i found which was causing the crash, for me it was the standard 1st and 3rd person folders including their blueprint folders. Hope this helps you!

Another error log if that helps, tried the above fix and it didn’t work for me.

Thanks

link text

Did you fix your issue ,if so what resolved it ? :))

How to you rebuild vs files ?

bro pls help.
how to rebuid vs files.
what is vs file?

Its most probably a video card driver issue, reinstall, all drivers

If the engine initializes 70% and returns the starter
You can try deleting (X:\UE_4.23\Engine\Plugins\UnrealEnginePython)Folder.
Hope it will be helpful to you:)

Thanks! It worked for me.

I try all the method that you guys mentioned except last one, where is “\UnrealEnginePython” Folder? My Engine is 4.23.1 build from source but I didn’t find that folder you mentioned, my problem is that when I try to save a actor called BeaconManager, it crashed with pic and in the crash log is same error with you guys, can anyone help me plz?

293674-1.png

You have to reinstall your video driver and update windows

Perfect - Works instantly! Thank you so much!!!

Thank you so much!

Thank you!!!

Currently facing the same issue, I have tried everything and it still will not work. How do you properly rebuild the VS files? Any help would be much appreciated. Trying to get the build of my game into alpha but stuck on this issue

Hi all,

That might help you as it solved my problem. The map was the problem, so I went in C:\Users"name_of_user"\Documents\Unreal Projects"name_of_project\Config. Open “DefaultEngine.ini” and delete the name of the map to start the project (just left “EditorStartupMap=”). And the project open without an issue but was still not able to open the map.

How do you rebuild vs files?

1 Like

Just wanted to reply that I had a similar issue, but this fix didn’t work for me.

However, I found a similar thread where the .uplugin file was the culprit. Changing the “LoadingPhase” parameter from “PostDefault” to “PreDefault” fixed my problem.

Thread Link: "Can't find file for asset. /Script/CableComponent" on 4.12