Hi, Richard What you want is: <dtml-call expr="REQUEST.set('tune_name',_['sequence-item'])"> but read further. There is another solution, too. Anything you do in ""quotes within a DTML tag is interpreted as a python expression. The way you wrote it , zope tried to evaluate the expression 'sequence-item' as "sequence minus item", and failed it because it could not find reference to the variable 'sequence'. One workaround is to gather the object from the '_' namespace. _['avariable'] gets the first thing named avariable, so _['sequence-item'] gets the current sequence-item, which is the above "quickie" answer. But what most of us do (sequence-item being a legacy in DTML from before expressions were allowed IIRC, so it would break a lot of existing code to rename it) is use a 'dtml-let' tag immediately after the 'dtml-in' tag. e.g., <dtml-in "_.string.split(tune_names,'|'")> <dtml-let currenttune=sequence-item> ...do something with currenttune... </dtml-let> </dtml-in> Using a 'dtml-let' allows you to use exactly the same syntax that you really wanted to use before, but now you have a handle to the thing you are working with, and it is evaluated as what you want, not a subtraction. hth. -- Jim Washington Richard Moon wrote:

Can anyone tell me why the following <dtml-in "_.string.split(tune_name,'|')"> <dtml-if sequence-start> <dtml-call expr="REQUEST.set('tune_name',sequence-item)">

raises the error "Error Type: Name Error Error Value:sequence"

It is the last line which raises the error.

This is the error I would expect if I was trying to use a variable which wasn't in the current namespace so I am confused why I cannot use sequence-item in this way.

Can anyone tell me the correct syntax (and why ) ?

Thanks in advance

Richard

Richard Moon richard@dcs.co.uk