Maybe 10.0.3 is still using the 32-bit file I/O API. If so, then it will only handle files up to 4 Gibytes. I have used SlickEdit on log files of over 100 Mibytes, and it can be a bit slow doing some things, but it did handle that as long as you were willing to wait for it to do things. Make sure you use a command line save command such as "save +O" so that it does not try to create a backup file! But 90 Gibytes is a bit excessive to expect any program to handle unless specially written for the job.