launcher • Workaround
Error 3001
NMD InvalidMDFileError during Base P4K download. The launcher failed to download or verify the main game data file (data.p4k). Usually caused by network interruption, corrupted download, or disk write issues.
Recommended steps
- checkstorage
- Rename data.p4k
- Adjust Download Settings
Verified build: SC Alpha 4.8 • Last checked: 2026-06-06