Hi,

I'm registering some custom simple formulas using workbook.RegisterUserDefinedFunction(formula). The workbook is then saved (in Excel2007 format). When the workbook is loaded again as a new workbook and the formulas registered on that workbook the formulas aren't connected/active. They do become active when individually reapplied to each of the cells they are used in but this is nasty and problematic. I can imagine that not having foreknowledge of the formulas during loading might result in this behaviour but it's really not very useful. So the question is: how can I register the user defined formulas so that they are active when the workbook is loaded? (using 17.1)

Thanks