Corrupted data file

[Johan Pretorius]

Hi there,

A friend's harddrive crashed. Most files could be recovered by a data
recovery service, including the files in their GnuCash data folder.

Gnucash fails to open the recovered file (and all its backups) saying that
there is no suitable backend for the file.

What I read after doing some Google searches makes me think that the files
are likely to be corrupted.

Is there any way to recover any of the data, or perhaps even just do an
integrity check on the data file?

Regards,
Johan