Hi Edoardo,
> restore(): error: file version mismatch: 0 (file) != 170901 (code)
restore() checks the start of the file for a tag encoding the file
format of the dump file. Here for example '0' is the tag in the file and
170901 is the expected version number (i.e. 1 september 2017) for the
file format (other formats are also possible, check the source code).
'0' is not a recognised dump file format.
One explanation is that your dump file is corrupted.
hope this helps,
Stephane