# 4661 Enabling File I/O Buffering Can Result in Corruption Error when Appending/Reading Data

---

I have just enabled the Buffer I/O in the Server 2.28. Now I get this error in the following situation:

ElevateDB Error #601 An error occurred with the statement at line 11 and column 8 (The table VideoList is corrupt (Error reading rows into cache - Size: 499544224 Offset: 499545064 Requested: 840 Actual: 0))

I have an application which writes records to a table iwth a TEDBTable while at the same time I do navigate in the same table in the same application and Session but with an TEDBQuery component. So this error occures as soon I reach the new records (I believe), which was new insert from the other EDBTable running at the same time. I can see how the record count is growing while navigate in the EDBQuery and can see the new added records until at some point..

This is the Call Stack.
:7551c54f KERNELBASE.RaiseException + 0x58
edbremote.TEDBRemoteSessionManager.HandleException($280FDF8)
edbremote.TEDBRemoteCursor.Find($5361FE8,False,False)
edbcomps.TEDBTable.GotoKey
edbcomps.TEDBTable.FindKey((...))
FMain.TfrmMain.BuildVideoList($58645E0,vltCategories,'','')
FMain.TfrmMain.BuildCategoriesList(False,'*')
FMain.TfrmMain.btnStartClick($35F82E0)