Hi Henry, thanks for sending the file. It is loading ok for me over here though, takes about 30 seconds to load on a Core i5-2500K CPU with 16GB memory.

It does take up 6GB of memory to load it - is it possible that you have a lot of other programs running taking up a lot of memory?

Is there anything unusual about where you're loading it from? Like are you loading it from a local hard drive or is it from some kind of virtual or network drive?

I will add an option in the next beta to use buffered file reading like it used to rather than memory mapping the whole file but it would be good for me to know why it's not working for you so I could automatically switch that off.

- Michael