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Member Since: ‎02-09-2014
Message 1 of 3 (409 Views)

hp prime - integration error

[ Edited ]

I have recently updated my hp prime with the newest firmware (build 5447). I use this calculator for my daily calculations of concrete cross-sections (moment, shearforce i.r.t. reinforcement etc.). Besides that, I was just playing around, when I discoverd something strange. If I try to solve this simple intergration (Normal/Cas-mode):


Int(x,dx) from 0 to 6:


it takes the calculator a long time to calculate and sometimes it completly freezes.

You can interupt the calculation by pressing 'On' and then (sometimes) it presents the value '18' (Cas) or 'Error: Invalid input' (Normal). The first value is of course correct.


Now, the strange thing about this problem is, is that if I am calculating:


Int(x,dx) from 1 to 6


Int(x,dx) from 0 to 5:


there is no lack or problem with the answer given.


Please HP, make this work. It looks like an real error in programming and I am not sure if this (or more) error effects other calculations.

With kind regards,

Bas van den Broek

Dycore BV - The Netherlands
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PhD Student
Posts: 871
Member Since: ‎08-10-2010
Message 2 of 3 (325 Views)

Re: hp prime - integration error



Sorry for the dalayed reply, I didn't notice your message at first between the other posts.


However, I suggest you post you question on the following forum:



calculator enthusiast
Top Student
Posts: 5
Member Since: ‎10-11-2015
Message 3 of 3 (186 Views)

Re: hp prime - integration error

Hi Bas,

I have a similar problem. I just bought the calculator and I am in the process of learning how to use it. Most of what I tried seems to work. However, when I try to integrate indefinite integrals, the sytem assigns the value of 7 to x and all my results are wrong. Sometimes the calculator freezes, sometimes it comes back with the error message" replacing 7 by x a substitution variable should perhaps be purged. I will soon find out if HP's customer support is available. I'll try to call them on Monday. 


Otherwise I like what they've done.



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