Help with VBA code for timer alert

[kumoko]

I'm using the following code to give an alert 10 seconds after I input a value into a cell

Sub StartTimer()

Static SchedSave
    If SchedSave <> 0 Then
    [COLOR=rgb(184, 49, 47)]Application.OnTime SchedSave, "Alert", , False[/COLOR]
    End If
    SchedSave = Now + TimeValue("00:00:10")
    'Timer set as 10 minutes, adjust as required
    Application.OnTime SchedSave, "Alert", , True
End Sub

Sub Alert()

MsgBox "!!!"

End Sub

However, after I dismiss the pop up box and input a new value, I get a run-time error '1004": method 'ontime' of object '_application' failed.

Any advice?

 

[kumoko]

Please ignore the colour code, just wanted to highlight that that's the code highlighted when debugging.