> Have you tried longer files? Maybe a few 100 MB or so. Maybe a buffer is not flushed correctly at the end of a run.

Yes, I did. This 7 KB of the data bank is about the limit. If we go only 1 KB higher it seems that we save all data. In 
our specific case, this is the number of time bins (256 pixels with 7 time bins results in data loss, with 8 time bins it 
seems to be okay, data type is DWORD). 

Of course, a workaround for us is to save at least 8 time bins and throw 7 of them away later on. Nevertheless, since we 
are only in the commissioning phase now this is okay, I would just like to avoid data loss in the data taking phase of the 
experiment so knowing where the problem origins could help. 

I did another test with another FE running that produces a lot of data. The behavior is the same though. If the bank size 
is less than about 8 KB, the bank is not saved anymore. But probably this is anyway the expected behavior since it is a 
different FE that produces the data. 

So if it is coming from the buffer, is there something I could change to test or solve the problem?

Best, Ivo