Hi John,
The line where you listed files all the ".xlsx" file together in a list can only call one file at a time. The way it is written above it would be looking for a file called "F:\Test\Week 1.xlsxWeek 2.xlsxWeek 3.xlsx.... etc". You are looking to call files "Week 1.xlsx" to "Week 13.xlsx" in order, then a loop can be put in to call each file individually and sum up cells D6. I revised the code and it is shown below. The "Do - Loop" no longer is relevant if you specifically call out each file rather than all files in a directory.
Hope that helps,
Daniel
Bookmarks