Well, the VBA code to open a second form to the record on the first would look like:
DoCmd.OpenForm "SecondFormName", , , "FieldName = " & Me.ControlName
Also, the column property is zero based, so you'd want a 1 for the second column. Try this
DoCmd.OpenForm "frmOpenEMC", , , "CallNo = " & Me.ListOpen.Column(1)
I'm guessing a little on which are the correct names. We also need to confirm where exactly you are; a macro or VBA code. We also need to make sure you aren't typing that directly into the properties window.
Paul
MS Access MVP 2007/2008