Yes, because you are using beta build.
------------------
It was fixed with beta build 5174 so look at this thread:
https://www.mql5.com/en/forum/491672
Ever since version 5.00 build 5172, 24 Jul 2025 the compiler doesn't work anymore
- 2025.07.24
- www.mql5.com
No matter what code I try to compile I get "fatal compiler error: unknown error 0 0...
Sergey Golubev #:
Ah okay, thank you. Im new to this system. Yes, because you are using beta build.
------------------
It was fixed with beta build 5174 so look at this thread:
https://www.mql5.com/en/forum/491672
Appreciate it.
You are missing trading opportunities:
- Free trading apps
- Over 8,000 signals for copying
- Economic news for exploring financial markets
Registration
Log in
You agree to website policy and terms of use
If you do not have an account, please register
After this mornings update on 24th July '25. Every EA I try to compile, even ones that have previously had no issues, are now showing fast 'Fatal Compiling Error : Unknown Error'
Im going to assume this isn't just myself having the issue.
Is there something I can do to counter this issues, Or just wait for update and fix?