I have a workbook where I'm trying to copy down some simple formulas, but I'm getting an error message "Selection is too large". I was trying to copy about 10,000 rows (with formulas in 11 columns), but have found that in order to avoid the error message I can only copy just over 4000 rows. The error message has no help button, just OK. There's no mention of "continuing without undo", incidentally, which I have seen before. I'm just trying to copy using the Excel interface - i.e., there's no VBA involved. Any help gratefully received...