invalid cab file after snapshot via FTP

I was able to successfuly retrieve a snapshot via FTP but the subscriber says
the snapshot .cab within the folder is invalid. What would make the file
invalid?
Jeffrey, this looks rather strange indeed. Which version of SQL server are
you running? Is the cab file marked read-only by any chance? Can you browse
the content of snapshot.cab directly in Explorer? Were there any strange
error messages in the snapshot agent history table? Does the problem go away
if you regenerate the snapshot?
-Raymond
"Jeffrey K. Ericson" wrote:

> I was able to successfuly retrieve a snapshot via FTP but the subscriber says
> the snapshot .cab within the folder is invalid. What would make the file
> invalid?