Hi, I'm using the nearblack utility on Windows. When I try to run it on a file that's just under 4GB, I get the following error: D:\Orthos>nearblack -white -near 17 Nanaimo_2006_30cm.tif ERROR 1: TIFFOpen:Nanaimo_2006_30cm.tif: No such file or directory Is this too big? Do I need to tile it out first (somehow)? Jason