#8 <dtml-in expr="findClassTitle(code=52.139)">

you might wanna try either <dtml-in expr="findClassTitle(code=_['class_code'])"> or <dtml-in expr="findClassTitle(code=_.getitem('class_code'))">

<dtml-in expr="findClassTitle(code=<dtml-var class_code>)"> *** syntax error

regards. -- pashah