comp.lang.idl-pvwave archive: archive » NaN Magic or Why Me?!

Home » Public Forums » archive » NaN Magic or Why Me?!

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: NaN Magic or Why Me?! [message #56815 is a reply to message #56761]

Wed, 14 November 2007 23:34

Mort Canty
Messages: 134
Registered: March 2003

Senior Member

Peter Mason schrieb:
> I'll add four cents to the kitty.
>
> One of the people I work with had frequent but unpredictable crashes with
> iTools on his Dell laptop. (Utter crashes right out of IDL, as with
> invalid memory access.) We couldn't repeat these crashes on other PCs
> around here. Coyote-like bug, aside from the lack of subtlety. Turns out
> he needed a video driver update. That fixed it.
>
> I have noticed a rare floating-point bug with CISCO VPN Client version 4.x.
> With this client running and connected, I get the occasional floating-point
> corruption in my program. (A regular app, not some kind of network thing.)
> I'm pretty sure it's caused by VPN client although I don't know exactly how.
> My program is all in C - no IDL - but I would expect the same thing applies
> to any code that gets stuck into a serious amount of FP calculations. The
> problem seems fixed in CISCO VPN client version 5.
>
> Peter
>
>
Thanks very much, Peter. As it happens I do run CISCO VPN 4.8 on the
computer that's giving the problem. I'll check that and also the video
driver. I'm now sure it's not an IDL programming error. I can generate
the NaNs in any intensive FP calculation with large arrays.

And thanks to everyone else who passed on their good advice (including
David's plug for the Mac - one never knows ...)

Mort Canty

Report message to a moderator

[Message index]

		NaN Magic or Why Me?! By: Mort Canty on Tue, 13 November 2007 09:42
		Re: NaN Magic or Why Me?! By: Mort Canty on Wed, 14 November 2007 23:34
		Re: NaN Magic or Why Me?! By: Peter Mason on Wed, 14 November 2007 16:47
		Re: NaN Magic or Why Me?! By: Mort Canty on Wed, 14 November 2007 10:06
		Re: NaN Magic or Why Me?! By: David Fanning on Wed, 14 November 2007 09:56

Previous Topic:	Efficient way to split an array of strings.
Next Topic:	Re: Efficient way to split an array of strings.

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 08:44:55 PDT 2025

Total time taken to generate the page: 1.03932 seconds