my forex MT4 EA can run on my local desktop but failed after migrated to the VPS,why?

[Long Chen]

i have tested my EA for many times on my local destop but failed after migrated to the VPS,why ? i have do as the instruction from the offical video.but i still failed! who can help me?

[Sergey Golubev]

You can check Virtual Platform Logs  to see - "why" (it should be written there).
I think - it may be related to the following:

1. you are making a mistake in sychronization;

2. EA is calling dll;

3. EA is using some files.

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[Sergey Golubev]

Synchronize - 
https://www.mql5.com/en/forum/211508  

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Forum on trading, automated trading systems and testing trading strategies

Meta 4 Robot help

Sergey Golubev, 2018.04.05 18:18

MQL5 VPS is for Metatrader 4 and Metatrader 5 - Forex VPS for MetaTrader 4/5 
So, you can check only the following: your EA (robot) is using dll, or not (because dll is not supported by MQL5 VPS).

...

Forum on trading, automated trading systems and testing trading strategies

Is 'Allow DLL import' and 'Allow modification of signal setting ' in MQL4 Indicators dangerous?

Sergey Golubev, 2017.09.09 06:05

Rules of Using the Virtual Hosting Service MetaTrader (Forex VPS)

No DLLs are allowed on a Virtual terminal. There is no physical capacity to use DLLs there.

If a program launched on a Virtual terminal tries to call a function from any DLL, this EX4/EX5 program is immediately stopped due to a critical error. Any DLL calls are forbidden.

How to transfer the files (for example, txt file) to VPS - 

Forum on trading, automated trading systems and testing trading strategies

VPS and txt

Rashid Umarov , 2019.02.13 15:52

First, read the online VPS help , there is also a video.

To transfer your own files to MetaTrader VPS, you need to specify the propert compiler in the code. It requires a certain level of ownership of the subject. 

Forum on trading, automated trading systems and testing trading strategies

VPS and txt

Slava , 2019.02.13 15:52

To transfer a file to a hosting server (as well as a tester agent), you need to use the directive

#property tester_file "<file_name>"

[Vilma Alves]

It is a very helpful post