Gp.7z.003 -

( .001 , .002 , .003 ) into the same folder?

If you provide the specific error code, I can give you a more precise solution. How to recover corrupted 7z archive GP.7z.003

If the archive is damaged, you can use the command line 7z t GP.7z.001 to test the integrity of all parts. 3. File Structure Knowledge GP.7z.003