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Re: PNG output quality degraded after RHEL6 patch [message #86961 is a reply to message #86951] Tue, 17 December 2013 07:22 Go to previous message
Paul Van Delst[1] is currently offline  Paul Van Delst[1]
Messages: 1157
Registered: April 2002
Senior Member
On 12/16/13 20:08, Starbuck wrote:
> On Monday, December 16, 2013 9:38:39 AM UTC-7, Paul van Delst wrote:
>> Hello,
[description of plot differences elided]
>
> The suggestions below don't quite fit with the information you
> provided (since it doesn't sound like you changed the IDL version),
> but I figured I would throw it out there just in case.
>
> What version of IDL are you using? If you are using IDL 8.2.3, make
> sure you have installed the patches for this version. The plots
> might be saved wrong if the 2nd patch is not installed. Do you have
> any other versions of IDL 8 installed on your system (such as IDL
> 8.1)? If you do, could you try using a different version to produce
> your plot and see if the same issue occurs?

Oops, yeah, i forgot to put that info in:
IDL> print, !version
{ x86_64 linux unix linux 8.2.2 Jan 23 2013 64 64}

I'm preparing to ask for the v8.2.3 upgrade which may help.

The fact that on Monday IDL-generated PNGs looked o.k., and on Tuesday
arvo after the RHEL6 patch they didn't suggests to me it's a system-y thing.

The only other v8.2.2-IDL-on-RHEL6 guy here is out this week so I can't
test on his system. We do have IDL v8.1 on the supa-computer login nodes
(which are RHEL6 also) but the network lag (it's in Orlando) coupled
with the v8.1 function graphics rendering speed means its unusable for
FG output. It's DG or nothing on that system.

I will hunt around here for other local IDLers (most linux folk here are
matlab or python types, and everyone else is cursed with windows+putty :o)

cheers,

paulv
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