"Value not readable" in Enterprise Guide

I have a dataset which seems to open fine in EG (can view the values), but when scrolling down I get the following error message:

An unexpected error occurred while attempting to read the data values. Do you wish to retry or cancel?

(details)

System.Runtime.InteropServices.COMException (0x80040E29): Can only roll backwards if DBPROP_CANSCROLLBACKWARDS is VARIANT_TRUE. (CODARowset::GetNextRows : lRowset < 0)
   at ADODB.RecordsetClass.Move(Int32 NumRecords, Object Start)
   at SAS.EG.DataAccess.DataModel.AdoBaseDataAccessor.Seek(Int32 recordNumber)
   at SAS.EG.DataAccess.DataModel.DataAccessor.PositionCursor(Int32 recordNumber)
   at SAS.EG.GridDataModelInterface.GridDataModelInterfaceClass.GetFormattedAndRawValue(Int32 rowIndex, Int32 columnIndex, Object& rawValue)
   at SAS.EG.DataGrid.DataGridClass.getCellValue(Int32 RowIndex, Int32 ColIndex, Object& rawValue)
   at SAS.EG.DataGrid.DataGridClass.OnQueryCellInfo(GridQueryCellInfoEventArgs e)

At this point, every cell in the table is overwritten with:

<Value not readable>

I do not think it is related to this track as I did not key 'enter': http://support.sas.com/kb/13/858.html

Any ideas?!!