[KevinH]

I am thinking of here:

void MainWindow::SplitOnSGFSectionMarkers()

Right after it does this:

        // Check if data is well formed before splitting.
        if (!html_resource->FileIsWellFormed()) {
            QMessageBox::warning(this, tr("Sigil"), tr("Cannot split: %1 XML is not well formed").arg(html_resource->Filename()));
            return;
        }

So it would only get invoked when a person intentionally tries to split a file but before the file is actually physically split.

KevinH