It looks like your formula "calculates" a valid off-sheet reference similar to:
+'Other Worksheet'!H5
Are you using that in an INDIRECT function by any chance?
To force a full recalculation you can press Control+Shift+A
Rory- is this something I would do in VBA? I've never used it before.I suspect you want something like this:
Code:Sub ConvertFormulas() selection.formula = selection.value End sub
after selecting all the cells.