cash flow report failure

[Shikamaru Nara]

Hi,

I am a new user of gnucash. I hope someone can help me with this problem.

I accidentally logout, while my gnucash is still running with unsaved
data. I recovered the data from log files. Everything is okay; but
when I generate my cash flow report, I am getting a report build
error.

This already happened before. I had to reenter my data, which was not
much a trouble then as it is now.

Is this a known issue? I tried searching with google but could not
find any solution / known issue.