Any limit on the file size of the archive other then actual disk space ?!?

Running on a XP system with NTFS format and I noticed when I created a Dir2Dat ZZZ_UNK set that I forgot to set the single file in it's own archive so when I was rebuilding this set it was stuffing everything into a single very large zip archive file. Got about 1.7GB before I stopped the process to recreate the datfile.