Oops... Hit the wrong button
You get the error because you have to concatenate the value of the combo box to create the where condition. Access is trying to evaluate the where clause; Access tries to execute what it thinks is a function: SelectSymbol.Column(0).
IF the bound column of the combo box was a number (not the report name) and you wanted to limit (filter) the records, the wherecondition you would use would look like:
Code:
DoCmd.OpenReport "rpt_Roadshow2", acPreview, , "RoadShow.RSID = " & Me.SelectSymbol