System.ArgumentOutOfRangeException: Non-negative number required.
Parameter name: totalWidth

Server stack trace:
   at System.String.PadHelper(Int32 totalWidth, Char paddingChar, Boolean isRightPadded)
   at RPPCAL.Util.DisplayWidthFormat.Format(String format, Object arg, IFormatProvider formatProvider)
   at System.Text.StringBuilder.AppendFormat(IFormatProvider provider, String format, Object[] args)
   at System.String.Format(IFormatProvider provider, String format, Object[] args)
   at RPPCAL.Views.CALCCSVTreeView.ReceptTreeNode.UpdateTextVisitor.Visit(Cレセプト共通Record record)
   at RPPCAL.Records.Cレセプト共通Record.Accept(IReceptRecordVisitor visitor)
   at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(RuntimeMethodHandle md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSi