[gradsusr] Memory Allocation Error When Using PRINTIM

[Jennifer Adams]

Hi, Stephen --
The error message you're seeing occurs when the printim code tries to  
allocate an array that contains the vertices of a filled polygon. It  
may be that your shapefiles have single polygons with so many vertices  
(e.g. the one that fills in most of Canada) that your 3.2Gb of RAM is  
not enough, or maybe an integer isn't big enough to represent the  
number of elements in the array, so it passes malloc some junk and you  
get an error. To complicate things, you are also using a deprecated  
shapefile interface that I didn't write.

See if you can reliably reproduce this error with the latest COLA  
version of GrADS. If so, then send me the simplest possible script and  
the required shapefiles, and I will try to reproduce the error on my  
own system that has lots and lots of available memory.
--Jennifer


On Dec 1, 2010, at 6:38 PM, Stephen McMillan wrote:

> John,
> After a full reboot, I re-ran script but with same memory allocation  
> error.  I tried to follow the Performance TAB on Task Manager while  
> running it, and did not notice anything out of the ordinary on  
> either the physical or kernel memory.  Also, CPU usage peaked  
> briefly to around 60%.
>
> It still works with 'gxyat...' but still puzzled why it won't do the  
> printim.  I use printim routinely, including after running  
> shapefiles, but have never encountered this problem as I recall.
> Stephen
>
> On Wed, Dec 1, 2010 at 4:20 PM, Huddleston, John <Huddleston at cira.colostate.edu 
> > wrote:
> Stephen,
>
>
> A question: if you reboot the XP box can you repeat the memory  
> allocation error? When you do it, start task manager and watch the  
> Performance TAB memory usage.
>
>
> John
>
>
> John Huddleston, PhD
>
> Cooperative Institute for Research in the Atmosphere
>
>
> From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org 
> ] On Behalf Of Stephen McMillan
> Sent: Wednesday, December 01, 2010 1:17 PM
> To: gradsusr at gradsusr.org
> Subject: [gradsusr] Memory Allocation Error When Using PRINTIM
>
>
> I believe this is the first time I've encountered this error in 7+  
> years of using GrADS, and could not find anything specific to this  
> in the User Archives:
>
>
> ga-> printim c:\temp\uscan.map.png x960 y720 white
>
> Memory allocation error: gxhpng
>
>
> I executed above  "printim" at the command line after creating a  
> test background map using various shapefiles and the shp_polyf/ 
> shp_lines commands.  No file was generated.  However, I do not get  
> the error when using "gxyat..." to create it, such as the file  
> attached.
>
>
> At the time of execution, I had an OPeNDAP connection to the latest  
> operational GFS forecast model at NOMADS.  Just prior to using the  
> shapefile commands, I had displayed a single variable to set the map  
> environment, and there were no defined variables.  The .shp files I  
> used ranged between 1 and 13MB size.
>
>
> I'm using GrADS 2.0.a7.oga.3 on a 3-4 years old Windows XP, with  
> 3.2GB RAM.  I have not yet tried this with the later opengrads or  
> cola versions.
>
>
> Stephen McMillan
>
> ***************************************************
> The information contained in this e-mail message
> is intended only for the use of the recipient(s)
> named above and may contain information that is
> privileged, confidential, and/or proprietary.
> If you are not the intended recipient, you may not
> review, copy or distribute this message. If you have
> received this communication in error, please notify
> the sender immediately by e-mail, and delete the original message.
> ***************************************************
>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>
> ***************************************************
> The information contained in this e-mail message
> is intended only for the use of the recipient(s)
> named above and may contain information that is
> privileged, confidential, and/or proprietary.
> If you are not the intended recipient, you may not
> review, copy or distribute this message. If you have
> received this communication in error, please notify
> the sender immediately by e-mail, and delete the original message.
> ***************************************************
>
> <backmap2.gs>_______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20101201/17fd1581/attachment-0003.html