qvector.h, line 538: Out of memory, std::bad

Hi,
we provide a software for our customers that can show either a graph or a table with
the measured values at a specific time. When i have big data and switch to table view
our software crashed with the message:

Code:

In file ..\..\include/QtCore/../../src/corelib/tools/qvector.h, line 538: Out of memory
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.
exited with code 3

Our software crashes (Release) at around 1,8 GB memory usage (from Windows 7 task manager).

qvector.h (Qt 5.6.2)

Code:

template <typename T>
void QVector<T>::reallocData(const int asize, const int aalloc, QArrayData::AllocationOptions options)
{
    Q_ASSERT(asize >= 0 && asize <= aalloc);
    Data *x = d;
 
    const bool isShared = d->ref.isShared();
 
    if (aalloc != 0) {
        if (aalloc != int(d->alloc) || isShared) {
            QT_TRY {
                // allocate memory
                x = Data::allocate(aalloc, options);
                Q_CHECK_PTR(x);   // THIS IS LINE 538

and this is the code to fill the table

Code:

for(int u=itemList.at(i)->idx;u<itemList.at(i)->mData->values.size();u++){
 
                if(ui->tableWidget->rowCount() < u+1)
                    ui->tableWidget->setRowCount(u+1);
 
                QTableWidgetItem* itemt = new QTableWidgetItem(loc.toString(itemList.at(i)->mData->timestamps.at(u)));
                itemt->setTextColor(itemList.at(i)->color);
                ui->tableWidget->setItem(u,(i+1)*2-2,itemt);
 
                QString tmp;
                if(itemList.at(i)->mData->errorFlag.length() > u){
                    if(itemList.at(i)->mData->errorFlag.at(u) == 0){
 
                        tmp = loc.toString(itemList.at(i)->mData->values.at(u)*setManager->getPressureFactor());
                    }
                    else if(itemList.at(i)->mData->errorFlag.at(u) & errflgUR) // Error UR
                        tmp  = tr("Underrange");
                    else if(itemList.at(i)->mData->errorFlag.at(u) & errflgOR) // Error OR
                        tmp  = tr("Overrange");
                    else if(itemList.at(i)->mData->errorFlag.at(u) & errflgSEDIS ) // Error SEDIS
                        tmp = tr("Sensor disabled");
                }
 
                QTableWidgetItem* itemp = new QTableWidgetItem(tmp);
                itemp->setTextColor(itemList.at(i)->color);
                ui->tableWidget->setItem(u,(i+1)*2-1,itemp);
 
                itemList.at(i)->idx = u;
            }

Has someone any idea to improve our code or any other help is welcome?
HappyCoder

qvector.h, line 538: Out of memory, std::bad_alloc