How about <dtml-var bcs null=0>? (Just a guess, but I would expect a zero length
string to be an
invalid integer value).
> I am using the Znolk Input Wizzard with postgresql tables. One of the
> variables in the table is an integer and can have null values. However, in
> the update and insert forms, if I attempt to leave the value null, I get the
> following error from Zope:
>
> "Invalid integer value for weight.bcs"
>
>
> The variable is defined throughout as :<dtml-var bcs null="">
>
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