Where does that error message come from? It isn't a standard error message.

How about showing the command you used to generate it, plus a dir of the source?

The "Unable..." message is my die alternative to system (take a look at the first post). The "1 file copied..." and "No such file..." messages are standard DOS messages (I've just translated them from my native language, portuguese). Here's the source code who generated the two files, sorry I couldn't translate the portuguese messages, but you should understand the code (I've putted some comments tough...). Thanks a lot for your help.

#!/usr/bin/perl -w
use strict;
use Win32::OLE;
use Tk;
use Tk::DialogBox;

my $mw = MainWindow->new(
                         -width => 350,
                         -title => 'Gerenciador de Planilhas',
                         -height => 50
                         );

my $Frame0 = $mw->Frame();
$Frame0->place( -x => 0, -y => 8, -height => 54, -width => 352);

#the following button activates the sub that generates the document

my $Button1 = $mw->Button(
                          -text => "Criar Planilha",
                          -relief => "raised",
                          -command => \&geraNova
                          );
$Button1->place( -x => 9, -y => 14, -height => 25, -width => 74);

my $Button2 = $mw->Button(
                          -text => "Sobre...",
                          -relief => "raised",
                          -command => \&onAbout
                          );
$Button2->place( -x => 203, -y => 14, -height => 25, -width => 64);

my $Button3 = $mw->Button(
                          -text => "Sair",
                          -relief => "raised",
                          -command => sub{exit 0}
                          );
$Button3->place( -x => 270, -y => 14, -height => 25, -width => 64);

$mw->geometry('350x50');
MainLoop;

# Below is the sub that creates the doc

sub geraNova
{
    my $ctrl = './control.dat';
    
    open(CTR, "+>>$ctrl") || die "Não foi posspivel abrir o arquivo. E
+rro: $!";
    flock(CTR, 2);
    
    my $id = <CTR>;
    
    flock(CTR, 8);
    close(CTR);
    
    $id = $id + 1;
    
    unlink $ctrl;
    
    open(CTR, "+>>$ctrl");
    flock(CTR, 2);
    
    print CTR $id;
    
    flock(CTR, 8);
    close(CTR);
    
    $id = addZeros($id);
    
    #I've renamed the file after it was created and after this app was
+ closed
    my $file = 'C:\foo\path1\test'.$id.'.xls';
    
    my $Excel = Win32::OLE->GetActiveObject('Excel.Application') || Wi
+n32::OLE->new('Excel.Application');

    # I've tested with the alerts enabled and there was no error
    $Excel->{DisplayAlerts} = 0;
    $Excel->{Visible} = 1;
    
    my $Book = $Excel->Workbooks->Add();
    $Book->SaveAs($file);
    
    my $ActBook = $Excel->Workbooks->Open("$file") || die "Não foi pos
+sível abrir a planilha. Erro: $!";
    
    undef $Excel;
    undef $Book;
    undef $ActBook;
}

sub addZeros
{
    my $num = $_[0];
    
    while(length($num) < 6)
    {
        $num = "0".$num;
    }
    
    return $num;
}

sub onAbout
{
    my $about = $mw->DialogBox(
                               -title=>"Sobre...",
                               -buttons=>["OK"]
                               );
    
    $about->add('Label',
                -anchor => 'w',
                -justify => 'center',
        -text => qq(
Excel Controller 1.0 by Er Galvão Abbott

-Dúvidas, Bugs ou sugestões:
galvao\@galvao.eti.br
                
- Visite meu site em:
http://www.galvao.eti.br/
                            )
                )->pack;

    $about->Show();
}
[download]

my ($author_nickname, $author_email) = ("DaWolf","erabbott\@terra.com.br") if ($author_name eq "Er Galvão Abbott");