I've followed Denise's instructions exactly, as far as I can tell, but "it" doesn't work. (Chap 2 - p 73-77; Case Study 1 - p 361 and following).

I have in a Standard Module [modBusinessLogic]:
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' General Error Handler to be called from most procedures

Public Sub GenErrHand(lngErrNumber As Long, strErrDesc As String,
strModuleSource As String, strProcedureSource As String)

    Dim strMessage As String

    strMessage = "An error has occured. Please report this info:" & _
        vbCrLf & "Error Number: " & lngErrNumber & _
        vbCrLf & "Description: " & strErrDesc & _
        vbCrLf & "Module: " & strModuleSource & _
        vbCrLf & "Procedure: " & strProcedureSource

        MsgBox strMessage, vbCritical

End Sub
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I have in a Form's Module [Form_FA1_OrgMaster_All]:
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  Private Sub cboOrgs_AfterUpdate()

    On Error GoTo HandleError

         (((NOTE: the first subform name below is misspelled - not supposed to be ...FinRpt..., rather ...FinRpts... - this sets up an error to test Error Handler)))

    Me.subfrmctrlFinRpt!cboIS_BySrv_List = Null
    Me.subfrmctrlFinRpts!cboIS_BySrv_List.Requery

                            ... More Code ...

    Exit Sub

HandleError:
    Dim strPrcdrName As String
    strPrcdrName = "cboOrgs_AfterUpdate"
    Dim strModName As String
    strModName = Application.CurrentObjectName

    Call GenErrHand(Err.Number, Err.Description, strModName, strPrcdrName)

    Exit Sub

  End Sub
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When I tested (with the Immediate Window) the Error Handler with a procedure in the Standard Module that would create an error (per Denise's instructions in Chap 2), it "worked". That is, it produced the Message Box I want.

But when I test it with the set up above (chosing an Organization in the Combo Box on the form), instead of getting the Message Box I want, I get "Compile Error: Method or data member not found" - which is obviously the regular VBA Message Box.

Why don't I get the Message Box from my Error Handler? Thanks

John D