A command crash report

Nov 8, 2015
%@filereadb[] function crashes on my Windows 8 64b

For instance,
set h=%@fileopen[Test.bin,r,b]
set x=%@filereadb[%h,911]
echo %x

Would crash with that data size length, but I've ever tried with less than it could keep up showing the sequence of number delimited by space.
How to resort this problem ? Many thanks in advance