RFC_READ_TABLE where IN sentence

Hi Guys!

I've looking a long time on the web, i would like some direction on this,

I'm using RFC_READ_TABLE transaction to parse some data from a table in SAP.

The problem is that I want to get the data for more than one order therefore I use the IN in the query as bellow:

I need to place several numbers on the list, when i type more than 2  number on:

tblOptions.AppendRow

tblOptions(1, "TEXT") = "MATNR IN ('000002840779902100','000009242000074000')"  

, it fires an error "system failure".

I need to pull out about 1k data numbers and i wrote a piece of code to add several numbers in a string variable:

Im using MARD table

Dim material as String

Dim eljuntos as String

dim myMaterialNumber(10000) as String

i = 1
j = 0
Do While Worksheets("Sheet1").Range("M2").Cells(i, 1) <> ""
    material = Worksheets("Sheet1").Range("M2").Cells(i, 1)
    j = j + 1
    If Len(material) = 10 Then
        myMaterialNumber(j) = "00000000" & Replace(material, "-", "") 'this sets the variable to 18 characters that is the required for the MATNR field
    Else
        myMaterialNumber(j) = "00000" & Replace(material, "-", "") 'this sets the variable to 18 characters that is the required for the MATNR field
    End If
     'This is because we have Part Numbers with length of 10 and 13 characters

     If j = 1 Then
        eljuntos = "'" & myMaterialNumber(j)

     Else

        eljuntos = eljuntos & "','" & myMaterialNumber(j)
     End If
i = i + 1
Loop

eljuntos = eljuntos & "'"

But when i try to use the sentence IN(, it appears a "system failure error", and doing it one by one takes too long.

objOptTab.Rows.Add

objOptTab(objOptTab.RowCount, "TEXT") = "MATNR IN (" & eljuntos & ") and "

objOptTab.Rows.Add

objOptTab(objOptTab.RowCount, "TEXT") = "WERKS EQ '7034'"

'This passes with no error,

'But when the function is called:

If objRfcFunc.call = False Then

      MsgBox objRfcFunc.Exception

End If

also tried:

tbloptions(1, "TEXT") = "WERKS EQ '7034' AND MATNR IN (" & ordCollector & ")"

It fires a "System Failure" Error.

I've found that the sentence OR could be helpful but i haven't found how this sentece works.

Please help Gurus!

Many thanks in advance!