If even one part is missing or corrupted, the entire extraction will fail. Check that all files have the exact same name except for the part number.
Right-click Part 01 (not Part 15) and select "Extract Here." WinRAR or 7-Zip will automatically pull data from all the other parts to reconstruct the original file. Common Use Cases sc19688-RDRI2IBLD143628EG.part15.rar
Since this file is , it is one piece of a larger set. To help you handle it, here is a write-up on what this file likely is and how to manage it. File Analysis & Identification If even one part is missing or corrupted,