Decoding error

[mezoni]

Is it possible to send you a file that has an error when decoding?
If I open this file in Excel and save it, then this error does not occur.
But this is not a public file.
I can't post it here.
P.S.
This file was generated by a tool (not ours).
Perhaps there are errors in the format, but it is possible that something was not taken into account.