[AccessD] Unknown Jet Error

I have the following code that runs when I click a button on a form. When I step though the code I get an unknown jet error message at the DoCmd.Close line. I have no idea what to look for. Thanks for any help.

Private Sub OpenPlantPressuresForm_Click()
On Error GoTo Err_OpenPlantPressuresForm_Click

    Dim stDocName As String
    Dim stLinkCriteria As String

    stDocName = "frm Plant Pressures Scatter"
    Stop
    DoCmd.OpenForm stDocName, , , stLinkCriteria
    DoCmd.Close acForm, stDocName
    DoCmd.OpenForm stDocName, , , stLinkCriteria

Exit_OpenPlantPressuresForm_Click:
    Exit Sub

Err_OpenPlantPressuresForm_Click:
    MsgBox Err.Description
    Resume Exit_OpenPlantPressuresForm_Click
    
End Sub

When the form opens the following code runs the is attached to the on enter event of the chart on the form.

Private Sub chtPlantChart_Enter()
    Dim GraphApp As Graph.Application
    Dim GraphObj As Graph.Chart
    Dim XMin As Single

    Set GraphObj = Me!chtPlantChart.Object
    
    GraphObj.Axes(1).MinimumScaleIsAuto = True
    XMin = GraphObj.Axes(1).MinimumScale
    GraphObj.Axes(1).MinimumScale = XMin + 1
    
    Me!chtPlantChart.SetFocus
    GraphObj.Application.Update
    Me.Repaint
End Sub
Chester Kaup
Engineering Technician
Kinder Morgan CO2 Company, LLP
Office (432) 688-3797
FAX (432) 688-3799

 
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