If the running balance on your Erste & Steiermärkische Bank statement does not add up row by row, that is exactly the kind of mismatch Convert·Into is built to catch rather than pass through silently. Every converted statement is reconciled line by line against the printed closing figure. The engine reads the running balance as the statement presents it, checking each row mathematically against its predecessor. When a row does not add up, it is flagged for review rather than discarding the whole file, so a single misread digit never forces you to rekey the rest.
If the Erste & Steiermärkische Bank statement you have is a scanned image or a phone photo instead of an exported file, that alone does not stop Convert·Into from reading the transaction table off it. Scanned or photographed statements are read with OCR before the extraction begins. The same running-balance check then verifies the output, catching characters the scan may have misread. If a figure fails verification, the row is marked for a quick correction, and the export proceeds with everything else intact.