| Error Message | Likely Cause | "Fix" (if any) | | :--- | :--- | :--- | | "Failed to load EX4" | EX4 is from a newer MT4 build (600+) | No fix. The decompiler is obsolete. | | "Access Violation" | Missing dependencies or corrupted crack | Reinstall on clean Windows 7 VM. | | "No valid license found" | Crack not applied correctly | Check antivirus; re-apply patch. | | "Output is empty" | EX4 is obfuscated (e.g., using Enigma Protector) | Decompiler cannot handle third-party obfuscation. |
| Feature | v404274 (Legacy Crack) | Modern Recovery Services (e.g., EX5 to MQ5) | | :--- | :--- | :--- | | Supported Build | MT4 Build 400-409 | MT4 Build 1350+ (rare) | | Success Rate | ~30% (broken logic) | ~70% (still imperfect) | | Virus Risk | Extremely High | Low to Medium (if paid) | | Legal Status | Illegal | Mostly illegal (grey market) | | Cost | "Free" (cost = your security) | $100 - $500 per file | | Output Quality | Uncompilable mashed code | Readable but obfuscated |
First, understand the numbers:
The advertised function is simple: convert a proprietary EX4 file back into a readable MQ4 file. In theory, this allows you to:
After installation, using the decompiler usually involves: ex4 to mq4 decompiler v404274 install
Even if you proceed with the legacy tool, here are fixes for frequent problems:
| Error Message | Solution |
|---------------|----------|
| "Component 'MSCOMCTL.OCX' not found" | Download and register MSCOMCTL.OCX using regsvr32 |
| "Decompilation failed - unsupported EX4 version" | Your EX4 is too new. Use build 400-500 EX4 files only. |
| "Runtime Error 9: Subscript out of range" | Corrupt EX4 or missing library exports. Try a different EX4. |
| Decompiled MQ4 shows only #include <stdlib.mqh> | The EX4 was obfuscated – no tool can recover it. |
| Antivirus deletes .exe on extraction | Create an exclusion folder before downloading. | | Error Message | Likely Cause | "Fix"
Assuming you manage to install it, here is what you actually install: