Fatal Error while retrieving data from Visual Fox Pro using OLE-DB UDS

Question

Hello all,
in a customer project we connected a Visual Fox Pro Database via OLE-DB UDS.
Whenever data is retrieved, a fatal error shows up:
Fatal Error: Error occurred while processing data stream, null
Although the data is retrieved correctly!
MII used: 11.5
UDS-Server: xMII OLE DB UDS, version 4.0.1.10
This is the log from the UDS-Server:
[02/29/2008-11:22:40.195] oleDB [P:4404, T:4792, Framework,   ERROR] 0x0      {extra params}: {5}     [LHDSChannelHandler.cpp @ 488, CLHDSChannelHandler::ExecuteIOCP]
[02/29/2008-11:22:40.195] oleDB [P:4404, T:4792, Framework,   ERROR] 0x17009     Exception occured: pid = 5, original = 5, data = <ExecutionContext><param name="MODE" value="QUERY"/><param name="QUERY" value="SELECT artikelnr FROM artikel "/><param name="ENDDATE" value="1204280560164"/><param name="ROWCOUNT" value="100"/><param name="STARTDATE" value="1204276960164"/></ExecutionContext>.     [LHDSChannelHandler.cpp @ 493, CLHDSChannelHandler::ExecuteIOCP]
********** Start of Exception Stack Trace **********
     1)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792,       UDS, ] 0x0     HRESULT: 0x80004005 [Unspecified error]     [BaseOleDbMode.h @ 1133, BaseOleDbMode<class COleDbQuery>::ProcessDynamicResults]
     2)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792,       UDS, RETHROW] 0x0     Rethrowing exception.     [BaseOleDbMode.h @ 1211, BaseOleDbMode<class COleDbQuery>::ProcessDynamicResults]
     3)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792,       UDS, RETHROW] 0x0     Rethrowing exception.     [Query.cpp @ 107, COleDbQuery::ExecuteOleDbMode]
     4)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792,       UDS, RETHROW] 0x0     Rethrowing exception.     [BaseOleDbMode.h @ 381, BaseOleDbMode<class COleDbQuery>::ExecuteMode]
     5)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792,       UDS, RETHROW] 0x0     Rethrowing exception over COM.     [LHDSUtil.h @ 1086, lhds::LHDSModeImpl<class COleDbQuery,struct ILHDSMode>::Execute]
     6)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792,       UDS, RETHROW] 0x0     Rethrowing exception.     [LHDSUtil.h @ 1124, lhds::LHDSModeImpl<class COleDbQuery,struct ILHDSMode>::Execute]
     7)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792, Framework, RETHROW] 0x0     Rethrowing exception over COM.     [LHDSDispatcher.cpp @ 135, CLHDSDispatcher::CallMode]
     8)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792,       UDS, RETHROW] 0x0     Rethrowing exception over COM.     [LHDSUtil.h @ 893, lhds::LHDataServerImpl<class CLHOleDbDataServer>::Execute]
     9)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792, Framework, ] 0x0     Caught exception over a COM boundry.     [LHDSChannelHandler.cpp @ 566, CLHDSChannelHandler::OnExecute]
     10)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792, Framework, RETHROW] 0x0     Rethrowing exception.     [LHDSChannelHandler.cpp @ 574, CLHDSChannelHandler::OnExecute]
     11)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792, Framework, RETHROW] 0x0     Rethrowing exception.     [LHDSChannelHandler.cpp @ 502, CLHDSChannelHandler::ExecuteIOCP]
     12)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792, Framework, RETHROW] 0x0     Rethrowing exception over COM.     [LHDSChannelHandler.cpp @ 189, CLHDSChannelHandler::Execute]
     13)     [02/29/2008-11:22:40.210] oleDB [P:4404, T:4792,      Host, HANDLED] 0x0     Handled exception.     [ThreadPool.cpp @ 228, ThreadPool::ThreadProc]
************** End of Exception Trace **************
Any help is very much appreciated.
Regards,
Matthias
Edited by: Matthias Wald on Feb 29, 2008 12:12 PM

Answer 1

Hi Salvatore,
tried your suggestian but no luck, same error.
I checked the Version. It shows 4.0.1.10.
Is there a later version available?
UDS Settings are (apologize any misspellings):
Collect Requests                              false
Log Level                                         Info
Maximum Concurrent Connections    1000
Pool Size                                         5
Port                                                 8087
Runtime Mode                                  Service
Service Dependencies                       Eventlog
Service Passowrd                              *******
Service Startup                                 Manual
Service User                                     .\LocalSystem
Shutdown Timeout                            10
Stack Size                                       0
Threading Model                               MTA
Trusted Requesters                         
Use IOCP                                        true
Connection String                            Provider=VFPOLEDB.1;Data Source=D:\Daten;Mode=Share Deny None;Extended Properties="";User ID="";Password="";Mask Password=False;Cache Authentication=False;Encrypt Password=False;Collating Sequence=MACHINE;DSN="";DELETED=True;CODEPAGE=1252;MVCOUNT=16384;ENGINEBEHAVIOR=90;TABLEVALIDATE=3;REFRESH=5;VARCHARMAPPING=False;ANSI=True;REPROCESS=5
Persistent Connectikon                     true
Show Affected Rows                         Minimal
Variant Representation                      String
I have changed MTA to STA and also tried other admin user for service without luck.
Any other hints?