G935f fail flash

Operation: Flash
Selected model: SM-G935F
Software version: 32.4
File analysis... OK
Total file size: 0x10C61DBF0 (4294 Mb)
Searching USB Flash interface... COM3 detected
Setup connection... OK
Reading PIT from phone... OK
Sending sboot.bin... OK
Sending param.bin... error timeout
Done with Samsung Tool PRO v.32.4

help me! thanks