[Zope] keyError problem when displaying string values of a Z SQL Method

[Hamzat kamal]

Hi,

I strictly followed the explanation on ch 10 of the zope book.

Kindly, point out what i am doing wrong here.

<dtml-in list_all_employees>
<li><dtml-var emp_id>: <dtml-var firstName> <dtml-var lastName> </li>
</dtml-in>

because i keep getting this error
Error Type: KeyError
Error Value: firstName

but each time i removed the <dtml-var firstName> the same type error 
displayed for lastName

and finally, when i removed both the <dtml-var firstName> <dtml-var lastName>

it displays the the list of emp_id for me correctly.

Regards.

kamal