【求助】保存文件失败

RobotStudio .NET exception: 流太长。
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Base exception: IOException
流太长。
在 System.IO.MemoryStream.Write(Byte[] buffer, Int32 offset, Int32 count)
在 System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
在 System.IO.StreamWriter.Write(String value)
在 System.Xml.XmlTextEncoder.Write(String text)
在 System.Xml.XmlTextWriter.WriteString(String text)
在 System.Xml.XmlWriter.WriteAttributeString(String localName, String value)
在 RobotStudio.API.Persistence.PimDocument.WritePropertyElement(XmlWriter wr, String elemName, Type type, Object value, Type replaceWith)
在 RobotStudio.API.Persistence.PimDocument.WritePropertyElement(XmlWriter wr, String elemName, Type type, Object value, Type replaceWith)
在 RobotStudio.API.Persistence.PimDocument.WritePropertyElement(XmlWriter wr, String elemName, Type type, Object value, Type replaceWith)
在 RobotStudio.API.Persistence.PimDocument.WriteObjectAttributes(XmlWriter wr, Type type, Object obj)
在 RobotStudio.API.Persistence.PimDocument.WriteObjectToXml(XmlWriter wr, ProjectObject obj)
在 RobotStudio.API.Persistence.PimDocument.SaveXml(XmlWriter wr, String docType)
在 RobotStudio.API.Persistence.PimDocument.SaveAs(String fileName, Boolean copy)
在 ABB.Robotics.RobotStudio.Project.SaveAs(String fileName)
在 ABB.Robotics.RobotStudio.Stations.Station.SaveAs(String fileName)
在 ABBInternal.FileCommands.FileCommandServices.SaveStationAs(String fileName)
在 ABBInternal.FileCommands.FileCommandServices.SaveStationAsDialog()
在 ABBInternal.FileCommands.SaveStationAsCommandHandler.SaveStationAsCommandHandler_ExecuteCommand(Object sender, ExecuteCommandEventArgs e)