RE: [Zope] Beginner question: user defined variables

Hi Michael,

<dtml-call "REQUEST.set('tot','tot' + charge_amt)">

What this line says, is to set a variable with the name 'tot' to 'tot'+charge_amt. You probably mean to add tot (without the quotes) to charge_amt. Zope thinks you try to add a float to a string and throws the reported error. First set 'tot' to 0: <dtm-call "REQUEST.set('tot',0.0)"> then in the loop add to variable tot: <dtml-call "REQUEST.set('tot',tot + charge_amt)"> And you should be all set. Douwe