If all parts are present but extraction fails, one of the segments may have been corrupted during download. Many users use tools like QuickPar to verify file integrity if parity (.par) files were provided by the uploader.
The file is the first segment of a multi-part split archive. Large datasets or software packages are often split into smaller "volumes" (like .001, .002, etc.) to make them easier to download or share on platforms with file size limits. kdmvarset.zip.001
You will need a third-party utility designed to "rejoin" these segments. If all parts are present but extraction fails,
Because the data is spread across multiple files, you cannot simply double-click the .001 file using standard operating system tools, which often fail to recognize the sequence. Large datasets or software packages are often split
Use an app like ZArchiver to select and extract the first part.
To access the contents of this specific file, you must treat it as a piece of a larger puzzle rather than a standalone ZIP file. How to Use Split Archive Files