segfault on qtextstream

[patcito]

hey all,
First I open a file "cutePOSinvoice.html" that I read with
QTextStream, then I put the content in a QString "templateoutput ". I
replace some text in templateoutput with some other string and then
create a new file "output.html" to write the new templateoutput string
into. Everything works fine except the writing cause when I remove it the app doesn't crash, it might be due to something else but I'm pretty clueless. Any idea what
I'm doing wrong? thanx in advance, here is the code:

QFile invoice("cutePOSinvoice.html");
if (!invoice.open(QIODevice::ReadOnly | QIODevice::Text))
            return;
 
QTextStream in(&invoice);
QString templateoutput = in.readAll();
 
qDebug() << templateoutput;
invoice.close();
QString clientIDinvoice = getAccountID();
 
templateoutput.replace (QString("$ClientID"),clientIDinvoice );
    QFile data("output.html");
    if (data.open(QFile::WriteOnly)) {
        QTextStream out(&data);
        out << templateoutput;
    }

QFile invoice("cutePOSinvoice.html");
if (!invoice.open(QIODevice::ReadOnly | QIODevice::Text))
            return;

QTextStream in(&invoice);
QString templateoutput = in.readAll();

qDebug() << templateoutput;
invoice.close();
QString clientIDinvoice = getAccountID();

templateoutput.replace (QString("$ClientID"),clientIDinvoice );
    QFile data("output.html");
    if (data.open(QFile::WriteOnly)) {
        QTextStream out(&data);
        out << templateoutput;
    }

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