# Check 3: Archive integrity if self.check_archive_integrity(): diagnosis["possible_causes"].append("Corrupted archive file") diagnosis["recommendations"].append("Re-download the archive or verify its checksum")

log_entry = { "timestamp": datetime.now().isoformat(), "error": "unarc.dll -1", "archive": archive_path, "archive_size_bytes": os.path.getsize(archive_path), "context": error_context }

# Check 5: Anti-virus interference diagnosis["possible_causes"].append("Possible anti-virus interference") diagnosis["recommendations"].append("Temporarily disable real-time scanning")

def try_low_memory_mode(self) -> Tuple[bool, str]: """Attempts extraction with lower memory usage""" # Implement extraction with chunked processing try: # Use slower but memory-efficient extraction os.environ['UNARC_LOW_MEMORY'] = '1' # Run extraction command with memory limits return True, "Successfully extracted in low memory mode" except: return False, "Low memory mode failed"

return False, "7-Zip extraction failed" def try_repair_archive(self) -> Tuple[bool, str]: """Attempts to repair corrupted archive""" # Implement archive repair using built-in tools return False, "Archive repair not possible"

Here's a comprehensive feature implementation to detect, diagnose, and potentially fix the "unarc.dll -1" error: 1. Error Detection Module import subprocess import os import psutil import hashlib from typing import Dict, Optional, Tuple class UnarcErrorHandler: """Handles unarc.dll -1 errors during archive extraction"""