Hello, I have a sytematic problem in that when I build in the XIRR, XNPV, and EOMONTH formulas into my models, and save and close the file, the next time I open the files these formulas are lost and replaced with #n/a. I am not using any macro in the file I'm working on. I have Windows Vista, newly installed. Can somebody please help me fix this issue. Thanks and regards
Ryan
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