Thanks Burrina but that just returned a different Run-time error 2450 - cannot find the referenced form 'frmActsSpecial'. The odd thing is that the other selections on the referenced combo box all bring up the report correctly. The last entry on the combo box just gives me this error. The entries are based on date ranges and reports data for those selected ranges.
Check the code for the current form and see what is there. If there is a Close procedure that should NOT be there.What is the name of the form that is open when you try and open this report? In design mode, look at any event code that is there.