TCMann wrote previously:
Bottom left corner of an open spreadsheet there's a "Calculate" button. When hovered over the popup says Excel is not set to calculate automatically & gives the option to do it manually.
The hover pop-up message is misleading.
I get the same pop-up in Excel 2010 (under the conditions described below), even though Automatic is set.
The problem is: your screenshot shows that Iterative Calculation is enabled.
And when Max Iterations is reached, recalculations are aborted, and the workbook is left in Calculation mode.
This is easy to duplicate. In a new workbook, set Automatic Calculation and Iterative Calculation, and set Max Iterations to 4.
Then in A1, enter the formula =IF(A1="", 1, ""). Obviously, the formula will ping-pong between the null string and 1 ad nauseum.
Note that the Calculation indicator remains in the lower-left status bar. And the pop-up reads as you described, namely:
Remedy: Deselect Iterative Calculation mode, and eliminate the circular calculations.
If the circular calculations are on purpose, change your design to avoid them.
If you have trouble with the redesign, post a __new__ thread to ask for help. Be sure to include a link to an uploaded example Excel file that demonstrates the problem.
IMHO, purposeful circular calculations are "evil". Often, they are unreliable. But more importantly, setting Iterative Calculation mode risks overlooking unintentional circular references that go undetected.