Truncated response data from bank

[dr-duplo]

Thanks for the great project. I use it in another project, which I will publish soon.

I experienced an issue when I try to get transactions over a longer date range, say a year or more. Some banks (especially Sparkasse) seem to truncate the response data in a weired way, so that it cannot be parsed as MT940 and you get an exception (maybe related to pull request #48).

My intermediate solution is to try split up the range and loop over Years/Months/Weeks/Days in decreasing order. Taking the next smaller period when the previous failed.

Any Idea on that?

Update:

The bank seems to send the HIKAZ data split up, but the FintTs parser seems not to concatenate them.
The next segment contains the missing characters right at the start of another HIKAZ.