HP-15C display flashes 'Error 8' when it should not?
06-29-2016, 01:15 AM (This post was last modified: 06-29-2016 10:52 PM by Marcio.)
Post: #1
 Marcio Senior Member Posts: 438 Joined: Feb 2015
HP-15C display flashes 'Error 8' when it should not?
Hello,

I noticed the 15C will flash the display if asked to find a root for the following equation, where R0 is a known and previously determined root:
$\frac{2^x+2x-\pi}{x-R0}$

This is the code I used:
Code:
LBL A 2 x<>y y^x x<>y 2 * + pi - x<>y RCL R0 - / RTN
R0 $$\approx 0.737$$ with FIX or SCI 3. Ask the calculator to solve again (I used 1 and 5 as guesses) and the display will flash with ERROR 8. Press return once to clear the display and a large number (although within the overflow bounds) will also flash. Press return again and it will stop flashing.

Searching the archives, I found this thread by Dave Britten in which he reported a bug in the 15C LE for similar reasons. Interestingly enough, I can not reproduce this on the 15C emulator for android by HP.

Is this a bug too or did I miss something?

Thanks
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