File Size too large

I'm attempting to FTP a file (6.54 Gig) from one RS6000 to another RS6000. It fails with message Transfer aborted - File Size too large.

Is there a size constraint I'm of which I'm unaware? Or are there settings needing to be changed? Any help would be appreciated.

What OSes / file systems are used on the machines? May there be a quota on the server?