Boris, I tried that today and I got the same message...

foreach $folder (@iqfolder_arr)
{ 
 #my $dirpath = '/ep005/egate/client/iq/';
 #$dirpath .= $folder;
 print($folder);
 $ftp_disco->rmdir($folder, 1) || die "FTP Message>@{[ $ftp_disco->mes
+sage ]}\n";

}
[download]

Here is the error message:
{E9424A48-0086-11D7-AE05-AD16EA76821A}FTP Message>{E9424A48-0086-11D7-AE05-AD16E A76821A}: Do not specify an existing file.