I have created a form named frmcommbysource with 3 controls.  First control
is a combo box named cbosource that has two fields, ID and name.  The other
two controls are both date/time picker controls called dtstart and dtend
respectively.  I then created the first of 3 queries used for a summary
report.  Two of the fields in this query are Tour_date and name.  I put the
following into the Tour_date criteria:  "
Between forms!frmcommbysource.dtstart and forms!frmcommbysource.dtend.  I
then created 2 parameters forms!frmcommbysource.dtstart date/time and
forms!frmcommbysource.dtend date/time.  I then put a button on the form and
added the following code in the click event:
dim stDocName as string

stDocName = "qryCommissionSummary"
docmd.OpenQuery stDocName, acNormal, acEdit

When I enter the dates and push the button the query runs ok.

I then added the following to the [name] field criteria:
forms!frmcommbysource.cbosource.column(1)  
-- Since column 0 is the id and column 1 is the name.  
Then I added the following to the parameters:
forms!frmcommbysource.cbosource.column(1)  text

when I run the frmcommbysource and pick a name from the combo, then dates
and hit the button I get the following error :
Undefined function forms!frmcommbysource.cbosource.column... in expression

I have checked for missing references and there are none.

Thanks for the help.

Ray