I updated my environment to the latest Version 4.5.2 and was suprised with a lot of Errors in processing Excel files. As those workflows and Excel files worked since month without troubles I needed quite some time to find out what happens. I suggest that the Excel reader and writer have been update (at least under the hood) and are now doing a deep analysis of the Excel file. Concequence of this is, that the node is now failing if any named area in the Excel is not correctly assigned (depite of used and relevant for the functionality). I needed to split all combined fields in Excel to find such Zombies to make the import work again. In the opposite, the writers performance has “crashed”. A batch production of a large number of Excel files took about some (3-4) minutes till now, but with the new version this lasts forever (20+ minutes). So don’t know what exactly is the benefit of the new versions, but on my side this was not a success.