>- take padr(alltrim(sys(1)) + alltrim(str(seconds()*1000)), 20, "0"), this creates a key that is virtually impossible to corrupt, but, the possibility exists, so, in my Table operations class, when I issue a save, I check to see if tableupdate() is sucessful, if not, I check to see if it is a primary key problem, if so, I simply replace the last "0" in the key with a "1".
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>I know it sounds a little hokey, but it works like a champ, an added benefit, is that it becomes very reliable when you allow users to work remotely, and upload their changes!

Sounds good but no locking mecanism.