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error description library for metatrader 4/5
Info
The error description library for metatrader 4/5 is a Library for MetaTrader 5 that the library provides functions to describe trade server return codes and runtime errors for metatrader 4/5. functions:- tradeserverreturncodedescription: returns a description of trade server return codes.
Usage
This tool is typically used for enhancing chart analysis and decision making.
Platform
This Library works exclusively on MetaTrader 5 (both build 600+ and newer versions).
Setup
Place the downloaded file in MQL5/Libraries folder via File ? Open Data Folder in MetaTrader 5.
How to Install and Use error description library for metatrader 4/5
1. Storage: Place library files in the MQL/Libraries directory to ensure they are accessible to your projects.
2. Implementation: Include the library in your code using the #import directive, ensuring you match the exact function names and parameters.
3. Compilation: Ensure the library is present in the directory before you compile your main EA or script, as the compiler links them during this phase.
4. Management: Keep libraries organized in sub-folders if you manage many custom functions to maintain a clean project structure.
Frequently Asked Questions
Q: What is a library file used for? A: Libraries store reusable code modules, allowing you to centralize common logic used by multiple EAs or indicators.
Q: Is a library executable? A: No, libraries are non-executable files containing functions; they must be imported into an EA, indicator, or script to function.
Q: Can I update a library while the platform is running? A: You should compile your EA or script after updating a library to ensure the latest code changes are integrated.
What this tool does
the library provides functions to describe trade server return codes and runtime errors for metatrader 4/5.
Typical Use Case
This Library excels in automated trading and technical analysis on MetaTrader 5.
Compatible Platform & Setup
This Library works on MetaTrader 5. Place the file in the MQL5/Libraries folder and restart the terminal.
Description & Settings
Related: Result Retcode Description - another powerful library for MetaTrader 5 traders.
the library provides functions to describe trade server return codes and runtime errors for metatrader 4/5.Also recommended: error desc - similar library with strong performance on MetaTrader 5.
functions:
- tradeserverreturncodedescription: returns a description of trade server return codes.
- errordescription: provides a description of runtime errors.
example:
copy the file errordescription.mq5 to the folder \metatrader 5\mql5\include.
errordescription.mqh usage:
this library demonstrates how to use the errordescription.mqh library.
code:
void onstart()
{
print("----- description of trade server return codes -----");
for(int i=10004;i<=10034;i++)
{
print("trade server return code:",i,tradeserverreturncodedescription(i));
}
print("-------- description of runtime error codes ---------");
for(int i=4001;i<=4014;i++)
{
print("runtime error code:",i,errordescription(i));
}
}
user-defined errors:
in certain scenarios, working with user-defined errors is necessary. mql5 provides the setusererror function to set the _lasterror variable. user-defined error codes start from err_user_error_first.
the errordescriptionext function can be used to describe errors, including user-defined ones:
errordescriptionext function:
string errordescriptionext(int err_code,string&user_errors[])
{
if(err_code>=0 && err_code
//--- user defined runtime errors
err_code-=err_user_error_first;
if(err_code<=arraysize(user_errors))
return(user_errors[err_code]);
//---
return("unknown error");
}
user error array:
string myerrors[] = {
"user error №1",
"user error №2",
"user error №3"
};
usererrordescr.mq5:
this script demonstrates the use of user-defined error descriptions.
code:
void onstart()
{
//---
for(int i=0;i<=2;i++)
{
setusererror(i);
print("user defined error code:",i,errordescriptionext(getlasterror(),myerrors));
}
}
You may also like: mq l plus enhanced error handler support - excellent alternative for library users on MetaTrader 5.
Source Code
#property copyright "robotfx"
#property link "https://robotfx.org"
#property version "1.00"
#include <errordescription.mqh>
string errordescriptionext(int err_code,string&user_errors[])
{
if(err_code>=0 && err_code<err_user_error_first) return(errordescription(err_code));
err_code-=err_user_error_first;
if(err_code<=arraysize(user_errors)) return(user_errors[err_code]);
return("unknown error");.......
⚠ Limitations & Risk Warning
- This tool is provided for educational and testing purposes only.
- Past performance does not guarantee future results.
- Trading involves substantial risk of loss. Use on a demo account first.
- Results may vary depending on market conditions, broker, and settings.
- We recommend thorough backtesting and forward testing before using with real funds.