Quest.FastData.FastDataException, "Encountered problem with spooling data to disk" (4275430)

Often when I add the . (dot) after a table name and Toad tries to pull up the column name options I get this error.

I can click ok to the error and continue, but it happens quite frequently.

This message id erratic, sometimes it can be frequent. The problem always happens in the Editor.

Sometimes I can gets this exception when opening a parenthesis as well.

The exception does not stop TDA, I can rid it and continue using TDA.

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Exception Information
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Exception: Quest.FastData.FastDataException
Message : Encountered problem with spooling data to disk.
Closing result spool file.
8192 rows lost from the current result.
Stack Trace:
at Quest.FastData.FastTable.RowCollection.Add(Object[] item)
at Quest.FastData.FastTable.AddRowAccepted(Object[] data)
at Quest.Toad.Oracle.OracleToadConnection.ReadRow(IDataReader reader, FastTable datatable, FastReadOptions options, PrePostProcessHandler prePostProcessHandler)
at Quest.Toad.Db.ToadDataAdapter.InternalFill(List`1 ret)
at Quest.Toad.Db.ToadDataAdapter.Fill(CommandResult commandResult)
at Quest.Toad.Trl.DataTabShowTrl.FetchObjectdata(ITrl objectTrl, Int32 fetchRows)
at Quest.Toad.CodeInsight.LanguageDialect.GenerateColumnData(ITrl objectTrl, ITrl columnTrl)
at Quest.Toad.CodeInsight.LanguageDialect.ReadVirtualList(IConnection connection, Insight insight, IncludeInsight include, Boolean filtering, String defaultSchema, Boolean refresh)
at Quest.Toad.CodeInsight.BaseDialect.GenerateInsight(IConnection connection, String defaultSchema, Boolean filtering, Boolean refresh, Insight insight, Boolean secondary, Boolean& hasSecondary, List`1 ownerList, Int32 pad, IInsightLookupRequest request)
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