public static bool IsDocExist(string name = "TOC")
{
if (!Documents.ContainsKey(name)) return false;
Document doc = Documents[name];
if (doc.FileDirectory.Contains("#")) // #Template substitute with Path in Dictionary
doc.FileDirectory = Templates[doc.FileDirectory];
if( !FileOp.isFileExist(doc.FileDirectory, doc.FileName) ) return false;
if (!doc.isOpen) getDoc(name, fatal: false);
if (!FileOp.isSheetExist(doc.Wb, doc.SheetN)) return false;
return true;
}