Excel VBA Global error handling - excel

Question

Is there a way to do global error handling?
Can I put some code in the Workbook code that will catch any errors that occur within all modules?
I could put the same error handler in each module but I'm looking for something more general.
I ask because I have sheet names that are stored as global variables like this Sheets(QuoteName). If there is an error then these global variables are lost. I have a macro that will rename the global variables but I put this within Workbook_BeforeSave.
I want it to go to the global error handler and rename the global variable if I get a Subscript out of range error for Sheets(QuoteName)

Answer 1

As Sid already mentioned in the comment, there is no central error handler.
Best practice is to have a central error handling routine that gets called from the local error handlers. Take a look at the great MZ-Tools: it has the possibility to define a default error handler at the press of a button (Ctrl-E). You can customize this error handler - and it can also contain module and/or sub name!
Additionally, check out this post at Daily Dose of Excel. It is Dick Kusleika's OO version of the error handler proposed in this book (which I can highly recommend).

Answer 2

Here's some code I threw together to handle the problem in access
It puts error checking in all subs, but not functions. subs have to have a parent form (ACCESS), or alternatively, you have to put the form name in manually. subs that are continued over more than one line will be mercilessly whacked.
The two subs have to be at the bottom of a module.
globalerror is your error management routine
CleaVBA_click changes your VBA code, adds line #s to everything
globalerror looks at a boolean global errortracking to see if it logs everything or only errors
There is a table ErrorTracking that has to be created otherwise just comment out from 1990 to 2160
When running, it removes then adds line numbers to everything in the project, so your error message can include a line #
Not sure if it works on anything other than stuff I've coded.
Be sure to run and test on a copy of your VBA, because it literally rewrites every line of code in your project, and if I screwed up, and you didn't back up, then your project is broken.
Public Sub globalerror(Name As String, number As Integer, Description As String, source As String)
1970 Dim db As DAO.Database
1980 Dim rst As DAO.Recordset
1990 If errortracking Or (Err.number <> 0) Then
2000 Set db = CurrentDb
2010 Set rst = db.OpenRecordset("ErrorTracking")
2020 rst.AddNew
2030 rst.Fields("FormModule") = Name
2040 rst.Fields("ErrorNumber") = number
2050 rst.Fields("Description") = Description
2060 rst.Fields("Source") = source
2070 rst.Fields("timestamp") = Now()
2080 rst.Fields("Line") = Erl
2100 rst.Update
2110 rst.Close
2120 db.Close
2130 End If
2140 If Err.number = 0 Then
2150 Exit Sub
2160 End If
2170 MsgBox "ERROR" & vbCrLf & "Location: " & Name & vbCrLf & "Line: " & Erl & vbCrLf & "Number: " & number & vbCrLf & "Description: " & Description & vbCrLf & source & vbCrLf & Now() & vbCrLf & vbCrLf & "custom message"
2180 End Sub
Private Sub CleanVBA_Click()
Dim linekill As Integer
Dim component As Object
Dim index As Integer
Dim str As String
Dim str2a As String
Dim linenumber As Integer
Dim doline As Boolean
Dim skipline As Boolean
Dim selectflag As Boolean
Dim numstring() As String
skipline = False
selectflag = False
tabcounter = 0
For Each component In Application.VBE.ActiveVBProject.VBComponents
linekill = component.CodeModule.CountOfLines
linenumber = 0
For i = 1 To linekill
str = component.CodeModule.Lines(i, 1)
doline = True
If Right(Trim(str), 1) = "_" Then
doline = False
skipline = True
End If
If Len(Trim(str)) = 0 Then
doline = False
End If
If InStr(Trim(str), "'") = 1 Then
doline = False
End If
If selectflag Then
doline = False
End If
If InStr(str, "Select Case") > 0 Then
selectflag = True
End If
If InStr(str, "End Select") > 0 Then
selectflag = False
End If
If InStr(str, "Global ") > 0 Then
doline = False
End If
If InStr(str, "Sub ") > 0 Then
doline = False
End If
If InStr(str, "Option ") > 0 Then
doline = False
End If
If InStr(str, "Function ") > 0 Then
doline = False
End If
If (InStr(str, "Sub ") > 0) Then
If InStr(component.CodeModule.Lines(i + 1, 1), "On Error GoTo error") <> 0 Then
GoTo skipsub
End If
str2a = component.CodeModule.Name
index = InStr(str, "Sub ") ' sub
str = Right(str, Len(str) - index - 3) ' sub
' index = InStr(str, "Function ") ' function
' str = Right(str, Len(str) - index - 8) 'function
index = InStr(str, "(")
str = Left(str, index - 1)
varReturn = SysCmd(acSysCmdSetStatus, "Editing: " & str2a & " : " & str)
DoEvents
If (str = "CleanVBA_Click") Then
MsgBox "skipping self"
GoTo selfie
End If
If str = "globalerror" Then
MsgBox "skipping globalerror"
GoTo skipsub
End If
component.CodeModule.InsertLines i + 1, "On Error GoTo error"
i = i + 1
linekill = linekill + 1
component.CodeModule.InsertLines i + 1, "error:"
i = i + 1
linekill = linekill + 1
component.CodeModule.InsertLines i + 1, "Call globalerror(Me.Form.Name & """ & "-" & str & """, Err.number, Err.description, Err.source)"
i = i + 1
linekill = linekill + 1
component.CodeModule.InsertLines i + 1, " "
i = i + 1
linekill = linekill + 1
If (str = "MashVBA_Click") Then
MsgBox "skipping self"
MsgBox component.CodeModule.Name & " " & str
GoTo selfie
End If
Else
If skipline Then
If doline Then
skipline = False
End If
doline = False
End If
If doline Then
linenumber = linenumber + 10
numstring = Split(Trim(str), " ")
If Len(numstring(0)) >= 2 Then
If IsNumeric(numstring(0)) Then
str = Replace(str, numstring(0), "")
End If
End If
component.CodeModule.ReplaceLine i, linenumber & " " & str
End If
End If
skipsub:
Next i
selfie:
Next
varReturn = SysCmd(acSysCmdSetStatus, " ")
MsgBox "Finished"
End Sub