Memory leak while acquiring data with NI DAQ USB device (Matlab 2020b)

Now I am acquiring analog input data by NI USB-6255.

I am facing a memory leak which cannot be released with flush nor with reset.

I conduct 42 ch single-ended voltage measurement with external scan clock and start trigger. The duration of the measurement is 7000 seconds and the data is read every 0.5 seconds as follows;

>> [trg,idx]=addtrigger(dq,"Digital","StartTrigger","External","Dev1/PFI1");
>> [clc,cdx]=addclock(dq,"ScanClock","External","Dev1/PFI0");
>> [fid1,message]=fopen('logfile.bin','w+');
>> start(dq,"Duration",7000);
>> while dq.NumScansAcquired < 1000 * 7000
>>         if dq.NumScansAvailable >= 1000 * 0.5
>>             [data,timestamps,~] = read(dq,seconds(0.5),"OutputFormat","Matrix");
>>             fwrite(fid1,[timestamps,data]','double');
>>         end
>> end
>> [data,timestamps,~] = read(dq,seconds(0.5),"OutputFormat","Matrix");
>> fwrite(fid1,[timestamps,data]','double');
>> flush(dq);
>> stop(dq); 

The memory usage grows up during the while-loop and not released after the flush nor the stop, which results in memory error in Matlab.

I am very glad if you kindly show me how to avoid it.

Cheers,

[Nuno Rodrigues]

I'm having the same issue. NumScansAcquired keeps increasing and I can't reset it or disable it. Have you found any solution?