Scheduled VBA task and 'Application.OnTime' - vba

Question

I have the following VBA code which is working well. It's calling another VBA Sub without any trouble:
Public Sub AutoPrintMissingHistoric()
Dim qdf As DAO.QueryDef
Dim rcs As DAO.Recordset
Dim db As DAO.Database
Dim j As Integer
Dim flag As Boolean
Dim i As Long
Dim value_start, value_end As String
Dim tmp As Date
Dim wbRiskedge As Workbook
Dim wsAccueil As Worksheet
Dim wsHistoric As Worksheet
Set wbRiskedge = Workbooks(StrWbRiskedge)
Set wsAccueil = wbRiskedge.Worksheets(StrWsAccueil)
Set wsHistoric = wbRiskedge.Worksheets(StrWsHistoricMissing)
If FistTime = True Then
Call Initialisation.CleanTab
Else
FistTime = True
Call Initialisation.Initialisation
End If
vDelay = 5
Cpt = Cpt + 1
Set db = DBEngine.OpenDatabase(strDB)
Set qdf = db.QueryDefs("Get_missing_fixings")
If Cpt <= wsAccueil.Range(ManualListLetter & "1").End(xlDown).Row Then
Application.StatusBar = wsAccueil.Cells(Cpt, ManualListLetter).Text
qdf.Parameters("arg1") = wsAccueil.Cells(Cpt, ManualListLetter).Value
Set rcs = qdf.OpenRecordset
j = 0
i = 1
flag = False
If Not rcs.EOF Then
rcs.MoveLast
rcs.MoveFirst
While Not rcs.EOF
j = 0
While j < rcs.Fields.Count
If flag = False Then
With Cells(i, j + 1)
If .Value = "" Then
.Value = rcs(j).Name
.Font.Bold = True
.HorizontalAlignment = xlCenter
.VerticalAlignment = xlBottom
End If
End With
Else
Cells(i, j + 1).Value = rcs(j).Value
End If
j = j + 1
Wend
If flag = False Then
flag = True
End If
i = i + 1
rcs.MoveNext
Wend
Call ChangeMinMax(rcs.RecordCount, CellMinDate, CellMaxDate, wsHistoric)
Call ParseParameters
Call SetReutersFunction
End If
rcs.Close
qdf.Close
db.Close
wsHistoric.Calculate
Application.StatusBar = wsAccueil.Cells(Cpt, ManualListLetter).Text & " - Next Function: FindMissingValue.AutoFindMissingValue"
sToCall = "FindMissingValue.AutoFindMissingValue"
MTimeGT = Time + TimeValue("00:00:" & vDelay)
Application.OnTime MTimeGT, sToCall
End If
End Sub
I put the execution of this process in a scheduled task. But apparently my code is not well executed: the FindMissingValue.AutoFindMissingValue Sub is not called because Excel just closes.
I think it's because of Application.OnTime MTimeGT, sToCall... What could be the reason?
Here you've the code of FindMissingValue.AutoFindMissingValue
Sub AutoFindMissingValue()
Dim wbRiskedge As Workbook
Dim wsAccueil As Worksheet
Dim wsHistoric As Worksheet
Dim i, nbResult As Long
Set wbRiskedge = Workbooks(StrWbRiskedge)
Set wsAccueil = wbRiskedge.Worksheets(StrWsAccueil)
Set wsHistoric = wbRiskedge.Worksheets(StrWsHistoricMissing)
If Left(wsHistoric.Range(ReutersFormula).Text, 13) Like "Retrieving...*" = True Then
sToCall = "FindMissingValue.AutoFindMissingValue"
MTimeGT = Time + TimeValue("00:00:05")
Application.OnTime MTimeGT, sToCall
Exit Sub
End If
i = WorksheetFunction.CountA(Columns(DateColumn & ":" & DateColumn))
If WorksheetFunction.CountA(Columns(ColumnResearchVResult & ":" & ColumnResearchVResult)) > 0 Then
wsHistoric.Range(FirstCellResearchVResult & ":" & ColumnResearchVResult & WorksheetFunction.CountA(Columns(ColumnResearchVResult & ":" & ColumnResearchVResult))).ClearContents
End If
nbResult = wsHistoric.Range(FirstResult).End(xlDown).Row
wsHistoric.Range(ColumnResearchVResult & LineResearchVResult - 1).Value = "Results"
If WorksheetFunction.CountA(Columns(DateColumn & ":" & DateColumn)) > 1 Then
wsHistoric.Range(FirstCellResearchVResult & ":" & ColumnResearchVResult & i).FormulaLocal = "=RECHERCHEV($" & DateColumn & "$" & LineResearchVResult & ":$" & DateColumn & "$" & i & ";" & FirstLockResult & ":$" & ValueResultColumn & "$" & nbResult & ";2;0)"
End If
Application.StatusBar = wsAccueil.Cells(Cpt, ManualListLetter).Text & " - Next Function: FindMissingValue.AutoPutResultInDb"
sToCall = "FindMissingValue.AutoPutResultInDb"
MTimeGT = Time + TimeValue("00:00:01")
Application.OnTime MTimeGT, sToCall
End Sub

Answer 1

The Application.OnTime part is right and FindMissingValue.AutoFindMissingValue should be called without any problem (after 5 seconds). What might happen is that, during this 5 seconds period, the code continues running, goes back to where AutoPrintMissingHistoric was called from, and the workbook might be closed before these 5 seconds have passed (although, depending upon your exact conditions, the function should be called even despite the workbook is closed).
You can either reduce the waiting period (vDelay = 1, for example) or just call the function directly (Call FindMissingValue.AutoFindMissingValue). Actually, I am not sure why you are calling the function by relying on Application.OnTime; using this is fine for "starting the process" (e.g., "I want my macro to be executed every day at 00:00"), but might drive to "messy situations" in case of being used on a regular basis.
If nothing of this works, please, provide the code of FindMissingValue.AutoFindMissingValue to take a look at it.
NOTE: after some further tests/discussions, I can confirm that the behavior of OnTime under these specific conditions is "too irregular". You should come up with a different approach to allow the waiting period you need or, in case of having to rely on OnTime, do an intensive trial-and-error to make sure that its behaviour is completely under control. This function is expected to be called once (opening the spreadsheet at certain time, for example) and thus you have to pay lots of attention when using it on different contexts (like this one: calling it inside a function).