I have looked through several posts (including the read from excel posts) and think I have all the nodes correct, but still no luck. I am using Revit2015, Dynamo 0.7.5 and Excel 2013. I first tried to write to an existing document on our network. Then I tried a new file on the network. Last tried a new file on my desktop. Excel does open, but no data is written to the file. Is it possible it is some security setting in Excel preventing the write? It just doesn’t seem that difficult!