Loosing ODBC connection

Hi all,

We recently converted an application from accecc97 to access2003.
We used to have 2 databases : 1 with all and only the data (axelD.mbd), 1 with all the forms, query's, ... (axelP.mdb)

We replaced the data (axelD.mdb) with an MSDE database, through UPSIZE and so on. That all worked fine.
This database is placed on the dataserver (DATA1), the converted programm is on the FRONT2 server (FRONT1 stil usess access97 until conversion is totally ready).

We are able to connect to the MSDE by using ADODB recordsets.
We are also perfect able to link the MSDEtables in our axelP.mbd database

We started to test some heavier parts of our application and started to get the following error:

"ERROR 3151"
"ODBC--connection to 'JOROSOFT' failed"

Nothing more.

This happened in a quite complex routine, whitch updates a lot of records, several times and so on.
We could reproduce the same error when executing the following code:

Public Function TestBestellingen()
Dim sql As String
Dim intervalset As DAO.Recordset
Dim planset As DAO.Recordset
Dim tellerke

x = Opendatabases()
tellerke = 0
sql = "Select bestelnummer from vkpbestellijn where bestelnummer > 100000"
Set planset = Db_AxelP.OpenRecordset(sql, dbOpenDynaset)
Do While Not planset.EOF
tellerke = tellerke + 1
Debug.Print tellerke & " - " & planset!Bestelnummer & " --> " & IsKlantStof(planset!Bestelnummer)
planset.MoveNext
Loop
End Function

Function IsKlantStof(p_bestelnummer)
Dim sql As String, rst As DAO.Recordset
Dim hulp_klantstof As Boolean

hulp_klantstof = False
x = Opendatabases()
sql = "select klantstof from vkpbestellijn where bestelnummer = " & p_bestelnummer
Set rst = Db_AxelP.OpenRecordset(sql, dbOpenSnapshot)

With rst
Do While Not .EOF
If !KlantStof = True Then
hulp_klantstof = True
.MoveLast
End If
.MoveNext
Loop
End With
rst.Close
Set rst = Nothing
IsKlantStof = hulp_klantstof
End Function

Function Opendatabases()
If Db_AxelP Is Nothing Then
Set Db_AxelP = DBEngine(0)(0)
End If
End Function
I know this code makes no sence in a real-time environment, but it was to reproduce the error.
This code basically runs trough a 30.000 records and does a little check for certain fields
After 1981 records we get the above error.
(sometimes after 1979 or 1980 or 1982 records)

1977 - 100859 --> True
1978 - 100860 --> True
1979 - 100860 --> False
1980 - 100861 --> True
1981 - 100861 --> True

"vkpbestellijn" is a table that is linked in the AxelP.mdb trough an ODBC connection.
We get the same error (and after 1981 times) if I change the where to a totally other range of "bestelnummer"

I have installed the latest patches of Jet 4.0, MSDE-server, ...

I've been searching the internet for abour 3 days now, and just cant even find the smallest clue what could make this happen.

I hope someone here has an idea.
If you need more details, just ask.

tia,
Axel.

P.S. I'm from Belgium, so my english aint "correct to the point".MSDE auto closes when the last user disconnects.

ALTER DATABASE MyDB AUTO_CLOSE OFF might take care of this.|||I tried that, but it didn't changed a single thing.

The exact same problem still occurs. :eek: :eek:

Getting desperate here. :o|||Is there no one around who recognises the problem or came across that problem?

I've tried playing with the Query governor, but that didn't changed a single thing.

The strange thing is that when i try the same code on a identically server that is in use by users, i have it less frequent.
It looks like the MSDE server cant keep up with all the quesry's executed. And when the server has more users working, it has enough time to release some things.

does that makes sence top anyone?