Error 539 , still persisting after all fixes including portable mode and compatability mode fixes

[Ryan Craig Hughes]

The topic title has been edited by a moderator - it's no longer in all caps. There is no need to shout.

Ive just spent the last 2 days trying to fix this error ive reinstalled windows , made mt5 portable , recompiled code , and basically everything else ai suggested, im  a pc repair technician, so if your still having problems dont blame yourself , i have done it all twice , ran everything in administrator mode, re downloaded different versions of the installations files and the antivirus exemption.

either way i need help from the people at the top of the top 

personally i think this has been done on purpose to keep every one at a lesser pace for the new year 

if its not intentional it should be fixed soon by metaquotes 

can everyone email metaquotes about error 539 as it needs to be done by the masses so they get on the fix quicker 

any one else here struggling or have an idea i havent mentioned 

thanks in advance........................

[Sergey Golubev]

Seems, you are using beta build of MT5 (5488 build ?).
You can download the stable build of MT5 - https://www.mql5.com/en/forum/500608/page2

[JoshuaMu]

Sergey Golubev #:
Seems, you are using beta build of MT5 (5488 build ?).
You can download the stable build of MT5 - https://www.mql5.com/en/forum/500608/page2

Most brokers have updated to version 5488

[Alain Verleyen]

JoshuaMu #:
Most brokers have updated to version 5488

Not at all.

Forum on trading, automated trading systems and testing trading strategies

All about MT5 updates.

Alain Verleyen, 2025.12.16 22:42

This topic will be used to bring together all information about MT5 updates process. This is NOT for chitchat.

---

1. To avoid undesirable update you need to work with account(s) from a BROKER. Using their server(s) and/or website to get one.
2. On the FIRST installation of MT5, from a mt5setup.exe you got from a broker site, it's very probable you will get the last BETA update. But after that you will get only official release updates.
3. MetaQuotes-Demo is NOT for testing your strategy or to be used as a demo account for trading practice. It's for TECHNICAL testing and using it, you have a very great chance to get a beta update.
4. When an official update is available, it will be pushed automatically, you will be notified about and invited to restart the MT5 Terminal.
5. The last official update is always the last one announced on this forum. It's also announced on the News category of metatrader5.com website.
6. ALL builds with a number higher than the last official release are BETA builds.

If you don't want to be a beta-tester, and so you don't want to receive beta-build :

• NEVER connect to MetaQuotes-Demo server.
• NEVER use MT5 Terminal Help menu=>Check for Updates=>Last Beta Version.

[Oscar Gomez Fuente]

I have the same issue.

I downloaded the latest stable version from my broker, which appears to be build 5488.

[Sergey Golubev]

Oscar Gomez Fuente #:

I have the same issue.

I downloaded the latest stable version from my broker, which appears to be build 5488.

Download the stable build by using this thread https://www.mql5.com/en/forum/502088 

If you like to be in beta build so change property indicator to the required one: post (in Russian language): #19 (I mean: it is because of property indicator_typeN indicator_styleN for example)

[Oscar Gomez Fuente]

Sergey Golubev #:

Download the stable build by using this thread https://www.mql5.com/en/forum/502088 

If you like to be in beta build so change property indicator to the required one: post (in Russian language): #19 (I mean: it is because of property indicator_typeN indicator_styleN for example)

It worked. Thank you!

[Manstros]

Ryan Craig Hughes:

The topic title has been edited by a moderator - it's no longer in all caps. There is no need to shout.

Ive just spent the last 2 days trying to fix this error ive reinstalled windows , made mt5 portable , recompiled code , and basically everything else ai suggested, im  a pc repair technician, so if your still having problems dont blame yourself , i have done it all twice , ran everything in administrator mode, re downloaded different versions of the installations files and the antivirus exemption.

either way i need help from the people at the top of the top 

personally i think this has been done on purpose to keep every one at a lesser pace for the new year 

if its not intentional it should be fixed soon by metaquotes 

can everyone email metaquotes about error 539 as it needs to be done by the masses so they get on the fix quicker 

any one else here struggling or have an idea i havent mentioned 

thanks in advance........................

Seriously, I've spent about 10 hours over the last couple of days on this. I did exactly what you did. My custom indicator was working fine until Saturday, and then it suddenly stopped working for no apparent reason. This is really frustrating. Please help to correct this.

[Sergey Golubev]

Manstros #:
Seriously, I've spent about 10 hours over the last couple of days on this. I did exactly what you did. My custom indicator was working fine until Saturday, and then it suddenly stopped working for no apparent reason. This is really frustrating. Please help to correct this.

Do not use beta builds of MT5. If you (suddenly) connected to MetaQuotes-Demo server and get beta build so use this summary thread to receive the stable build - 
All about MT5 updates. 

And compile (recompile) your indicators in stable build to avoid this issue/error 539.

Forum on trading, automated trading systems and testing trading strategies

New MetaTrader 5 Platform Build 5430: Enhanced Charts Powered by Blend2D

Alain Verleyen, 2026.01.05 13:56

Compile them with 5430, not with a beta.

[Alain Verleyen]

Error 539 fixed in build 5495.