I use Vegas Pro 15 and I'm attempting (several times now) to export my files as Pro Tools AAF but I keep getting an error message (see below). The message appears when I'm 95% completed! Does any have any suggestions? Thanks.

Deinterlace method ignored.
Motion blur type ignored.
Unexpected problem: System.InvalidOperationException: Sequence contains no matching element
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
   at VegasScripts.ProToolsExporter..ctor(String outputFile, Vegas vegas, Project project, LogCallback log, Action createUndoBlock, Action disposeUndoBlock)
   at VegasScripts.ProjectInterchangeExporter.<GetCustomCommands>b__a(String outFile, Vegas vegas, Project project, LogCallback log, Action createUndoBlock, Action disposeUndoBlock)
   at VegasScripts.ProjectInterchangeExporter.<>c__DisplayClass1d.<ExecuteSteps>b__1c(String outputFile, Project project)
   at VegasScripts.ProjectInterchangeExporter.ExportProjectStep.ExportProjectStep_DoWork()
   at ScriptPortal.MediaSoftware.Archive.SinglethreadStep.Run()
   at ScriptPortal.MediaSoftware.Archive.Steps.NextStep()
Archiving complete.