Not Implemented 7zip -

try: result = subprocess.run(cmd, capture_output=True, text=True, check=False) if result.returncode != 0: if "Not implemented" in result.stderr: # Fallback to basic compression print("Fallback to default compression") cmd = ['7z', 'a', output_path, source_path] result = subprocess.run(cmd, capture_output=True, text=True, check=True) return result.returncode == 0 except subprocess.CalledProcessError as e: print(f"7-Zip error: e.stderr") return False create_7z_archive("./docs", "backup.7z", password="secret", compression_level=7) Option B: Using 7z.dll / lib7z (C/C++) #include <Windows.h> #include "7z.h" // Load 7z.dll dynamically HMODULE h7zLib = LoadLibrary("7z.dll"); if (!h7zLib) printf("Failed to load 7z.dll"); return;

// Get function pointers FARPROC CreateObject = GetProcAddress(h7zLib, "CreateObject"); if (!CreateObject) printf("Not implemented: CreateObject not found"); FreeLibrary(h7zLib); return; not implemented 7zip

// Set library path (7z.dll) SevenZipExtractor.SetLibraryPath(@"C:\Program Files\7-Zip\7z.dll"); try: result = subprocess

var compressor = new SevenZipCompressor(); compressor.ArchiveFormat = OutArchiveFormat.SevenZip; compressor.CompressionLevel = CompressionLevel.Ultra; try compressor.CompressDirectory(@"C:\Input", @"C:\Output.7z"); catch (SevenZipException ex) if (ex.Message.Contains("Not implemented")) // Fallback to basic settings compressor.CompressionMethod = CompressionMethod.Lzma; compressor.CompressDirectory(@"C:\Input", @"C:\Output.7z"); try: result = subprocess.run(cmd