Thanks for all the help so far. I have made tons of progress on my app, and now I'm trying to add a little polish.
I have this code: # Loops through the MAC Addresses and puts them in a list # MAC Addresses is from a prior query options=[str(my_macaddr[i].MacAddr) for i in range(len(my_macaddr))] #creates the form for choosing which Optimizers, from which time frame form=SQLFORM.factory(Field('Optimizers',requires=IS_IN_SET(options,multiple='multiple'))) My app throws an error if you click the submit button without selecting an item from the list in the form. I have tried adding 'zero=T('Choose one')', both with and without adding the string 'Choose one' to the list 'options'. What would the best way to validate this be? -- Lorin Rivers Mosasaur: Killer Technical Marketing <http://www.mosasaur.com> <mailto:lriv...@mosasaur.com> 512/203.3198 (m)