[Zope] Key Error

Hello. Zope is flagging me with a 'Key Error' when I try to execute the following code. <dtml-let numberDegrees="REQUEST.get('numberDegrees')"> <dtml-in "_.range(0, _.int(numberDegrees), 1)"> <dtml-let degree_description="REQUEST.form['degree_description_<dtml-var sequence-item>']"> </dtml-let> </dtml-in> </dtml-let> The variables designated by degree_description_<dtml-var sequence-item> are being successfully passed into this DTML method from a DTML document. However, I don't know any other way of accessing them within the loop. Any help would be greatly appreciated. Thanks. - Asad