runtime error in application

From: Bineesh Namboodiri (BineeshNamboodiri_at_discussions.microsoft.com)
Date: 10/27/04 

Date: Wed, 27 Oct 2004 02:23:04 -0700

when iam running a process called convert(user-defined)in my application
which is to convert data from excel *** to sql server table it's giving me
error that "runtime error 2147417851(800010105)
Automation error, server threws an exception". this error is coming only to
one process in my four process . all other are running fine . it's an
application which support data warehousing concepts . the database is
sqlserver 2000 & VB 6.0. This process is to convert data From EXcel file to
a table in sql server which is used for cube creation in further steps.[my
other process takes data from text file only & this process takes data from
excel file].Also this process is working from my source code . but when iam
trying it from exe file of the application it's giving me this error.
  
with this iam attaching a part of my source

Private Function ConvertInvestments(crtbrname)
    Dim oBook As Excel.Workbook
    Dim o*** As Excel.Work***
    Dim objExcel As Excel.Application
    Dim rstInvest As ADODB.Recordset
    Dim writeStr() As Double
    
    Set objExcel = New Excel.Application
    Set oBook = objExcel.Workbooks.Open((APath & "\" & crtbrname &
"\Investment.xls"))
    Set oSheet = oBook.Worksheets(1)
    Set rstInvest = New ADODB.Recordset
    Call InitRecset(rstInvest, "Truncate Table Investment")
    Set rstInvest = Nothing
    Call DeclareRec(rstInvest, "Select * from Investment")
    preProduct = ""
    preCurrency = ""
    For lpVar = 2 To o***.Columns.CurrentRegion.Rows.Count
        If Trim(preProduct) <> Trim(o***.Range("A" & lpVar).Value) Then
Call getHOProductCode(Trim(o***.Range("A" & lpVar).Value),
Trim(o***.Range("A" & lpVar).Value), Trim(o***.Range("E" & lpVar).Value))
        If Trim(preCurrency) <> Trim(o***.Range("F" & lpVar).Value) Then
Call getCurrencyCode(Trim(o***.Range("F" & lpVar).Value))
        If HOProductCode <> 0 Then
            rstInvest.AddNew
            rstInvest!ProductCode = HOProductCode
            rstInvest!Description = Left(Trim(o***.Range("B" &
lpVar).Value), 30)
            If Trim(o***.Range("D" & lpVar).Value) <> "" Then
                rstInvest!InterestRate = o***.Range("D" & lpVar).Value * 100
            Else
                rstInvest!InterestRate = 0
            End If
            If IsDate(o***.Range("C" & lpVar).Value) = False Then
                rstInvest!MaturityDate = "01/01/1900"
            ElseIf CDate(o***.Range("C" & lpVar).Value) <
CDate("01/01/1900") Or CDate(o***.Range("C" & lpVar).Value) >
CDate("01/01/2079") Then
                rstInvest!MaturityDate = "01/01/1900"
            Else
                rstInvest!MaturityDate = CDate(o***.Range("C" &
lpVar).Value)
            End If
            rstInvest!Amount = (o***.Range("E" & lpVar).Value)
            rstInvest!CurrencyCode = CurrencyCode
            rstInvest!CurrencyRate = (o***.Range("G" & lpVar).Value)
        End If
    Next lpVar
    If Not rstInvest.EOF Then rstInvest.Update
    oBook.Close
    Set oBook = Nothing
    Set o*** = Nothing
    objExcel.Quit
    Set objExcel = Nothing
End Function

This part is called when going for conversion process which is also iam
attaching

If chkInvest.Value = vbChecked Then
            If (fs.FileExists(APath & "\" & crtbrname & "\Investment.xls"))
Then
                Call RefreshPrgBar("Investments", crtbrname)
                Call ConvertInvestments(crtbrname)
              
            End If
        End If
It directly converts data in the XLS file to table called investment