Why the error of out of range at large return

[cschang]

Error: "ORA-06513: PL/SQL: index for PL/SQL table out of range for host language array ORA-06512: at line 1
/vd2/asp/BinInactivityRe sults.asp, line 249"

the error only appeared when I had a large number records return (> 12000), anything less 7000 is fine (I had not tried any number between). Wonder why? I am using oracle 8.1.7, retrun table type reocrds with my IIS 4 on NT 4

'ASP sysntax as
...
set commBinAct = server.CreateOb ject ("ADODB.Command ")
commBinAct.Acti veConnection = connBinAct
commBinAct.Comm andText = pkgcall
commBinAct.Comm andType = adCmdText
commBinAct.Para meters.Refresh
' .. other command object parameters

set rsBinAct = server.CreateOb ject ("ADODB.Records et")
rsBinAct.Cursor Location = adUseClient
rsBinAct.Open commBinAct

....
l_rowcount = rsBinAct.Fields ("o_rowcount ")
....

'display the recordset in HTML table

Do While NOT rsBinAct.EOF
..

Loop

' to regain the all records for other use
IF cint(l_rowcount ) > 0 Then
commBinAct.Para meters(5) = 1
commBinAct.Para meters(6) = cint(l_rowcount )
rsBinAct.Close
rsBinAct.Open commBinAct ' <--- line 249
Session("Inacti veBIN") = rsBinAct.GetRow s
End If

set commBinAct = Nothing
rsBinAct.Close
set rsBinAct = Nothing
connBinAct.Clos e
set connBinAct = Nothing