Re: HP-42s question about "Invalid Data" Message #5 Posted by Jeff O. on 23 Oct 2006, 12:44 p.m., in response to message #2 by Bill (Smithville, NJ)
Real RESults mode will allow complex results, but only from complex arguments. An operation on a real number that would require a complex answer will result in the "Invalid Data" message in Real RESults mode. If you enter the real number in complex form with zero as the imaginary component, the 42S will give a complex answer even in Real RESults mode. I think that Real RESults mode was included to provide compatibility with the 41C, which of course had no complex mode.
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