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How to fix the #SPILL! error in Microsoft Excel

There are two ways to fix this cause of the #SPILL! error. First, select the entire spill range (or at least the cell or ...
How-To Geek on MSN

Don't trust Excel's COUNTA function to count non-blank cells—here's a better method

In most counting scenarios in Excel, COUNTBLANK reliably counts blank cells, and COUNTA reliably counts populated cells.